One early study reported that sexual intercourse
was associated with earlier onset of labor and reduced the need for labor
induction at 41 weeks . More recent studies have not shown that increased sexual activity
softens the cervix or brings on labor more rapidly.
Although semen contains prostaglandins which are known to soften the cervix and
cause contractions the amount of prostaglandin delivered with each encounter may
not be enough or vary too much in quantity to give consistent results.
HAVE A QUESTION? EMAIL US AT:
Tan PC, et. al., Effect of coitus at term on length of gestation, induction of
labor, and mode of delivery. Obstet Gynecol. 2006 Jul;108(1):134-40. PMID:
2. Schaffir J.Sexual intercourse at term and onset of labor.Obstet Gynecol. 2006
3. Omar NS, et. al., Coitus to expedite the onset of labour: a randomised
trialBJOG. 2013 Feb;120(3):338-45. doi: 10.1111/1471-0528.12054. Epub 2012 Nov
4. Tan PC, et. al., Effect of coital activity on onset of labor in women
scheduled for labor induction: a randomized controlled trial.Obstet Gynecol.
5. Yost NP, et. al.,Effect of coitus on recurrent preterm birth. National
Institute of Child Health and Human Development, Maternal-Fetal Medicine Units
Network. Obstet Gynecol. 2006 Apr;107(4):793-7. PMID:
6. Gerozissis K, et. Origin of prostaglandins in human semen. al., J Reprod
Fertil. 1982 Jul;65(2):401-4. PMID:
7. Cooper TG, et. al., World Health Organization reference values for human
semen characteristics.Hum Reprod Update. 2010 May-Jun;16(3):231-45. PMID: