In plain words
Vaginal seeding is a practice in which a newborn born by is wiped with swabs that have touched the mother's vagina. The aim is to pass on some of the bacteria a baby gets during a vaginal birth. Babies born by cesarean have a different early gut and skin microbiome, and researchers are studying whether it matters. The practice carries real infection risks, including , herpes, and other organisms. The American College of Obstetricians and Gynecologists advises against it outside research studies. Mothers who ask about it can talk with their provider about what is known and what is not.
The deeper version
Vaginal seeding was introduced by Dominguez-Bello and colleagues (Nature Medicine, 2016), who studied 18 infants, four of them born by cesarean and swabbed with maternal vaginal fluid, and reported partial restoration of vaginal-type taxa on the skin and in the gut over the first month, with no clear adverse events in that small pilot. Larger and longer studies have not confirmed clinical benefit, and the relationship between early microbiome composition and later asthma, allergy, or obesity is associative. ACOG Committee Opinion 725 (2017) recommends against vaginal seeding outside research protocols, citing transmission risk of , herpes simplex, and other pathogens. Ethical debate centers on consent for infants in an experimental procedure without proven benefit.
Where it comes up
- Gut health before and during pregnancyBefore Pregnancy
- Planning a cesareanGetting Ready for Birth
- What happens in a cesareanBirth and the First Days
- Newborn procedures: vitamin K, eye ointment, hepatitis B, screeningGetting Ready for Birth
What mothers here say about vaginal seeding
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Sources
- American College of Obstetricians and Gynecologists — Committee Opinion 725: Vaginal Seeding, 2017
- Dominguez-Bello MG et al. — Partial restoration of the microbiota of cesarean-born infants via vaginal microbial transfer. Nature Medicine 2016
- American Academy of Pediatrics — Policy statement on group B streptococcal disease in newborns, 2019