Exposure of the Baby to a Rich Mixture of Coliform Organisms from the Birth Canal.

Previous research has pointed out that a good draught of such organisms seem to be healthy, as children brought up after delivery by Caesarean have a much higher incidence of atopic allergic reactions than those delivered through the birth canal.[1] Moreover, the colonic microbiome differs across babies born by vaginal vs. abdominal routes. Many have taken this evidence to heart, and have started to paint the baby’s face with a swab marinated in vaginal secretions. A balanced editorial in the BMJ [2] says that such a practice should not be recommended lest the baby be inoculated with less benign organisms called Beta Strep, resident in some vaginas. But if a woman wishes to practice such a procedure, she should not be inhibited from doing so, pending a trial big enough to determine the net long-term effects.

— Richard Lilford, CLAHRC WM Director


  1. Neu J, & Rushing J. Cesarean versus Vaginal Delivery: Long term infant outcomes and the Hygiene Hypothesis. Clin Perinatol. 2011; 38(2): 321-31.
  2. Cunnington AJ, Sim K, Deierl A, et al. “Vaginal seeding” of infants born by caesarean section. BMJ. 2016; 352: i227.



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