Custody of a Breastfeeding Baby in Spain: Judicial Criteria

🇪🇸 Read the original in Spanish

When a couple with a newborn baby decides to separate or divorce, one of the most complex and emotionally intense questions that arises is how the custody and care of the child will be organised. The situation becomes especially delicate when dealing with a breastfeeding baby, as the constitutional right of both parents to co-parenting clashes with the biological and developmental needs of the infant. In the Spanish legal system, there is no mathematical rule written in the Código Civil (Civil Code) that prohibits joint custody of a baby, but the jurisprudence of our courts has been shaping very specific criteria to protect, above all, the best interests of the minor.

The Legal Framework: What does Spanish law say about the custody of infants?

To understand how judges approach the custody of a breastfeeding baby, it is essential to analyse the reference regulatory framework in Spanish family law. The legislation does not explicitly contain a different "custody" or patria potestad (parental authority) based on the age of the minor, but rather establishes general principles that the judge must adapt to each specific case.

The Civil Code and the best interests of the minor

The fundamental pillar of any decision on care and custody is *Article 92 of the Código Civil. This article establishes that joint custody will be granted whenever it is beneficial for the child. However, when dealing with a breastfeeding baby (especially during the period of exclusive breastfeeding, which usually covers the first 6 months of life, and mixed or maintenance breastfeeding up to the first or second year*), judges apply this article with extreme caution.

*Article 103 of the Código Civil** also allows the judge to adopt provisional measures regarding the care of children in the event of a lack of agreement, always assessing the concurrent circumstances. The absolute guiding criterion is the "best interests of the minor" (interés superior del menor), an indeterminate legal concept that the Tribunal Supremo* (Supreme Court) has defined as the satisfaction of the child's basic needs (physical, emotional, and developmental) above the interests of the parents themselves.

Law 15/2005 and the evolution of joint custody

Law 15/2005, of July 8, amended the Código Civil regarding separation and divorce, formally introducing joint custody (custodia compartida) into Spanish common law. Although this law encourages parental co-responsibility, the jurisprudence of the Tribunal Supremo (with landmark rulings such as that of April 29, 2013) has reiterated that joint custody is not an exceptional measure, but rather the preferable alternative, provided that it is viable. In the case of breastfeeding babies, the physical viability of natural breastfeeding is a heavy factor that usually modulates the application of this regime.

Organic Law 1/2004 on Integrated Protection Measures against Gender Violence

It is imperative to point out that, pursuant to *Article 92.7 of the Código Civil (in line with Organic Law 1/2004*), a joint custody regime—or individual custody in favour of the alleged abuser—will not be established when either parent is involved in criminal proceedings initiated for attempting against the life, physical integrity, freedom, moral integrity, or sexual freedom and indemnity of the other spouse or children, or when there are well-founded indications of gender or domestic violence.

The key criteria assessed by judges in Spain

When deciding on the custody of a breastfeeding baby, the magistrates of the Juzgados de Primera Instancia (Courts of First Instance) or Family Courts rely on technical reports and a series of criteria consolidated by jurisprudence:

1. Proven breastfeeding: Natural breastfeeding is a biological public health factor supported by the World Health Organization (WHO). If the mother proves that she is exclusively breastfeeding (usually through reports from the pediatrician), judges tend to grant sole custody to the mother so as not to interrupt this cycle of feeding and primary attachment. However, this breastfeeding must not be used as a "shield" or abuse of the law to prevent the relationship with the father; it must be real and justified.
2. The age of the minor: The courts usually distinguish three critical stages in the baby's development:

• From 0 to 6 months: Period of exclusive breastfeeding. Joint custody with alternating overnight stays (pernoctas) is practically non-existent in this phase.
• From 6 months to 1 or 2 years: Transition period. Complementary feeding is introduced. Progressive visitation regimes without overnight stays are usually established.
• From 2 or 3 years onwards: Phase of greater autonomy for the minor. This is the age at which the courts consider the establishment of full joint custody, including overnight stays, to be viable.

1. Attachment and stability of the minor: Who has been the primary caregiver of the baby since birth and the availability of space and time of each parent are assessed.
2. The relationship and communication between the parents: For joint custody or a progressive visitation regime to work, a minimum and civilised communication between the parents is required, especially to coordinate sleep patterns, milk feeds, and medical care for such a young baby.

Step-by-step practical steps to apply for custody

If you are in the process of separating and a breastfeeding baby is involved, these are the legal and practical steps you must follow in Spain:

1. Attempt family mediation or out-of-court negotiation: Before resorting to contentious court proceedings, it is highly recommended to try to draft a Convenio Regulador (regulatory agreement) by mutual consent. A progressive parenting plan agreed upon by the parents will always be better accepted by the baby than a judicial imposition.
2. Filing the lawsuit: If an agreement is impossible, a lawsuit for divorce or for parental-child measures (if the couple was not married) must be filed before the Juzgado de Primera Instancia of the family home. This lawsuit must be signed by an Abogado (lawyer) and a Procurador (court representative).
3. *Request for Provisional Measures (Article 104 of the Código Civil): Given that judicial processes can take months, a hearing for prior or simultaneous provisional measures (medidas provisionales*) is usually requested along with the lawsuit (or before) so that the judge can urgently regulate custody, the use of the home, and child support while the main trial is being processed.
4. Submission of medical evidence and reports: It is crucial to provide the baby's medical history, reports from the pediatrician proving the status of breastfeeding, feeding guidelines and, if necessary, reports from psychologists or the judicial psychosocial team (gabinete psicosocial), which is a unit attached to the court.
5. Holding the trial hearing: Both parties will present their arguments. The Ministerio Fiscal (Public Prosecutor's Office) will always intervene in this process to defend the rights of the minor.
6. Ruling and enforcement: The judge will issue a ruling (sentencia) establishing the custody regime. If the baby's circumstances change (for example, upon turning 2 years old or ending breastfeeding), a Modification of Measures (Modificación de Medidas) can be requested.

Deadlines, costs, and key figures you should know

In the field of family law, time and financial costs are critical variables. Below are the most relevant figures and deadlines in the Spanish judicial system for this type of procedure:

• 0 to 6 months: The age of the baby at which exclusive breastfeeding usually determines sole maternal custody, with short visits for the father (for example, 2 hours a day, 2 to 3 times a week) and no overnight stays.
• 18 to 24 months: The usual age from which Spanish courts begin to consider it viable for the minor to spend the night with the non-custodial parent on a gradual basis.
• 3 to 5 months: This is the average resolution time to obtain a Provisional Measures order in most judicial districts in Spain.
• 8 to 12 months: Average duration of a contentious family court proceeding until a first-instance ruling is obtained.
• €150 to €400: The average monthly range for child support (pensión de alimentos) per child that a court in Spain usually sets to cover the basic needs of an infant (nappies, vaccines not covered by the Social Security, clothes, special food), depending on the parents' income.
• €1,200 to €3,000: Average cost of the fees for a lawyer and a court representative for a contentious family proceeding of this nature. If it is by mutual agreement, the total cost can be reduced by half (€600 to €1,500), and both professionals can be shared.

Practical examples of custody regimes for babies

To visualise how courts resolve these situations in practice, we analyse two common scenarios with real economic and time-organisation data.

Example 1: The case of Lucía and Carlos (4-month-old baby with exclusive breastfeeding)

Lucía and Carlos separate. They have a common baby, Mateo, who is 4 months old. Lucía works from home and maintains the exclusive breastfeeding recommended by the pediatrician. Carlos requests immediate 50% joint custody.

• Typical judicial resolution: The judge denies immediate joint custody due to the baby's young age and the proven exclusive breastfeeding. Sole care and custody is granted to Lucía.
• Visitation regime for Carlos: A progressive regime without overnight stays is established so as not to break the bond with the father or interfere with the milk feeds. Carlos will be able to be with Mateo on Tuesdays and Thursdays from 17:00 to 19:30 (picking him up and dropping him off at the mother's home), and on Saturdays and Sundays from 11:00 to 14:00 and from 17:00 to 19:30.
• Child support: A pension to be paid by Carlos is set at €220 per month, in addition to 50% of extraordinary expenses (uncovered medical expenses, etc.).
• Evolution: The court order establishes that when the minor turns 12 months old, the visitation regime will be extended to alternating weekends from Saturday at 10:00 to Sunday at 20:00 (introducing the first overnight stay), provided that the minor has adapted.

Example 2: The case of Sofía and David (14-month-old baby with maintenance breastfeeding)

Sofía and David end their cohabitation. Their daughter, Valeria, is 14 months old. She breastfeeds at night and in the morning as a supplement, but already eats solids during the day. Sofía works in person at an office and David has an intensive morning work shift.

• Typical judicial resolution: The judge assesses that the minor already has a diversified diet and that both parents have the capacity to reconcile work and family life. However, as she is under 2 years old and still breastfeeds at night, sole custody is chosen for the mother, but with a very broad visitation regime for the father that prepares the way for future joint custody.
• Visitation regime for David: David will enjoy the minor two afternoons during the week (from 16:30 to 20:00) and alternating weekends. On weekends, the overnight stay is introduced only on Saturday night (pick-up on Saturday at 10:00 and drop-off on Sunday at 20:00).
• Child support: David pays €250 per month.
• Progression clause: It is determined that, when Valeria turns 24 months old, this regime will terminate and automatically transition to a joint custody system on alternating weeks, at which point the ordinary child support pension will terminate (with each parent assuming the minor's expenses during their stay and opening a joint account for school and medical expenses).

Mistakes you should avoid

In family proceedings involving children of such a young age, making certain strategic or behavioural mistakes can seriously harm your position in court and, worse, the baby's well-being:

• Using breastfeeding instrumentally: Trying to artificially prolong breastfeeding or claiming that the baby "only wants to be with the mother" without real medical support, with the sole purpose of preventing the father from spending time with the minor. Judges and psychosocial teams quickly detect these obstructive behaviours and can penalise them by reducing the mother's credibility.
• Demanding immediate overnight stays for the infant without transition: On the part of the non-custodial parent (usually the father), pretending to take a 3 or 6-month-old baby to sleep at his house overnight, ignoring the minor's biological rhythms. This generates unnecessary stress for the infant and is usually flatly denied by the courts.
• Interrupting communication with the other parent: Failing to inform about vaccines, pediatrician visits, food intolerances, or the baby's developmental milestones. The lack of communication is the main argument used by judges to deny joint custody, understanding that the parents are unable to cooperate in upbringing.
• Failing to provide documentary evidence of the family organisation: Going to trial without employment contracts that prove work schedules, without a detailed parenting plan, or without proving who has a suitable home adapted to the baby's needs (cot, safety measures, etc.).

Frequently Asked Questions (FAQ)

Is there a legal minimum age in Spain for joint custody to be agreed?

No, the Spanish Código Civil does not establish any minimum age. Theoretically, it can be agreed from birth if both parents agree to it by mutual consent in a Convenio Regulador and the Ministerio Fiscal approves it. However, through contentious proceedings (when the judge decides), the majority of jurisprudence places the ideal age to start full joint custody with overnight stays from 2 years of age, carrying out a progressive visitation regime until then.

Can the father give bottles of expressed breast milk to encourage joint custody?

Yes. Currently, judges value very positively that the mother expresses milk so that the father can feed the baby during his visitation periods. This demonstrates an attitude of co-responsibility on the part of the mother and allows the father to strengthen attachment bonds with the infant. If the mother flatly refuses this option without a justifying medical cause, the judge may interpret it as a lack of willingness to cooperate.

What happens if the mother has to return to work after maternity leave?

The mother's return to work (generally at 16 weeks of the baby's life) is a factor that judges take very much into account. As the possibility of exclusive breastfeeding on demand during the working day is lost, it facilitates the flexibilisation of the father's visitation schedules, who can take care of the minor during those hours if his work schedule allows it, before resorting to nurseries or external caregivers.

What is a "Parenting Plan" and why is it vital for a breastfeeding baby?

The Parenting Plan (Plan de Parentalidad) is a detailed document presented to the judge specifying how co-responsibility will be exercised. In the case of an infant, it must detail minutely how milk feeds, the introduction of solid foods, visits to the pediatrician, the use of the baby's clothes, the transport of the pram and cot will be managed, and how the time spent with each parent will evolve as the child grows. Presenting a serious and viable plan multiplies the chances of success in court.

In summary

• Spanish legislation always prioritises the best interests of the minor over the wishes of the parents.
• Exclusive breastfeeding (up to 6 months) is a determining biological factor that usually grants sole custody to the mother on a temporary basis.
• Judges apply progressive visitation regimes without overnight stays during the first months of life to guarantee secure attachment with both parents.
• From 18 to 24 months onwards, the introduction of overnight stays and the transition towards a joint custody model is considered viable.
• Fluid communication between the parents and the presentation of a detailed Parenting Plan are indispensable requirements for the judicial process to be successful and not harm the minor.

General legal information, not personalised legal advice. For your specific situation, ask your question for free at AbogadoAI — answers grounded in Spanish law (BOE), in English.

This is general information, not legal advice. Verify on the BOE or consult a lawyer for your specific case.