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Fulltext Coitus and orgasm at term: effect on spontaneous labour and pregnancy outcome

Tan PC, Yow CM, Omar SZ

Singapore Med J, 2009 Nov;50(11):1062-7.
PMID: 19960160

INTRODUCTION: Coitus and orgasm in late pregnancy are believed to facilitate the onset of labour. We aim to evaluate the relationship at term of reported coitus and orgasm with spontaneous labour.
METHODS: Women at term scheduled for non-urgent labour induction were asked to keep a coitus and orgasm diary. These women were recruited for a randomised trial on the effect of coitus to promote spontaneous labour. For this analysis, the women were categorised into coitally-active and abstinent groups according to their coital diary. Spontaneous labour prior to the date of scheduled labour induction was the primary outcome. Labour, delivery and neonatal outcome were also evaluated. Multivariable logistic regression analysis was used to control for significant variables.
RESULTS: On univariate analysis, the inverse association of coitus with spontaneous labour was borderline (odds ratio [OR] 0.6; 95 percent confidence interval [CI] 0.3-1.0; p-value is 0.052). Orgasm was not associated with spontaneous labour (p-value is 0.33). After adjustment, coitus (adjusted OR 0.4; 95 percent CI 0.2-0.8; p-value is 0.009) displayed a significant inverse association with spontaneous labour. Coitus and orgasm were not associated with any other adverse pregnancy outcome.
CONCLUSION: Women who reported coitus were less likely to go into spontaneous labour prior to their scheduled labour induction. Reported coitus and orgasm were not associated with adverse pregnancy outcome.

Matched MeSH terms: Labor, Obstetric/physiology
Epidural analgesia in primigravidae in spontaneous labour at term: a prospective study

Leong EW, Sivanesaratnam V, Oh LL, Chan YK

J Obstet Gynaecol Res, 2000 Aug;26(4):271-5.
PMID: 11049237

OBJECTIVES: To prospectively study the intervention rate, duration of labour, malpositions, fetal outcome, maternal satisfaction, voiding complications and adverse events in healthy primigravidae in spontaneous labour at term following epidural analgesia.
METHODS: A prospective randomized study involving 55 patients in the epidural group and 68 in the control pethidine--inhalational entonox group.
RESULTS: There were significantly more obstetric interventions (instrumental deliveries) in the epidural group (p < 0.01). The total duration of labour and the duration of the second stage was prolonged in the epidural group (p < 0.01). There were more malpositions at the second stage of labour in the epidural group (p < 0.02). There were no differences in fetal outcome (Apgar scores and Special Care Nursery admissions). Patients in the epidural group were consistently happier with their method of pain relief (p < 0.01). Two patients required blood patches while another 2 patients had persistent backache post epidural analgesia.
CONCLUSION: Epidural analgesia in primigravidae in spontaneous labour at term led to an increased instrumental delivery rate, prolonged duration of labour, greater rate of malpositions in the second stage, increased oxytocin requirements but with no difference in fetal outcomes but with happier mothers as compared to the control group.

Matched MeSH terms: Labor, Obstetric/physiology*
Ethnic influence on uterine activity in spontaneous normal labour

Arulkumaran S, Gibb DM, Chua S, Singh P, Ratnam SS

Br J Obstet Gynaecol, 1989 Oct;96(10):1203-6.
PMID: 2590656

Uterine activity in spontaneous normal labour was studied in Singaporean Malay women at term with a singleton vertex presentation. Nulliparae had significantly higher uterine activity compared with their multiparous counterparts. Uterine activity in the Malay population was compared with that of a similar Chinese population. When controlled for parity, maternal height and birthweight of babies, there was no difference in uterine activity between the two groups.

Matched MeSH terms: Labor, Obstetric/physiology
The Effectiveness of Hypnosis Intervention for Labor: An Experimental Study

Beevi Z, Low WY, Hassan J

Am J Clin Hypn, 2017 Oct;60(2):172-191.
PMID: 28891771 DOI: 10.1080/00029157.2017.1280659

Hypnosis has been shown to help pregnant women experience improved labor and postpartum periods. The present study compares the differences between experimental (n = 23) and control groups (n = 22) on specific variables measured both during labor and 24 hr postpartum. The participants in the experimental group received the hypnosis intervention at weeks 16, 20, 28, and 36 of pregnancy, while those in the control group received only routine antenatal care. The data collected at the labor stage describe the length of the labor stage, pain relief used during labor, the method of delivery, and the type of assisted vaginal delivery. Within 24 hr of delivery, data on neonatal birth weight, neonatal Apgar scores, and self-reported pain were obtained. The labor stage results showed no significant differences in the length of the second and third stages of labor. Although the participants in the experimental group reported higher pain levels immediately prior to, during, and immediately after delivery, their use of pethidine during labor was significantly lower than the control group participants. None of the experimental group participants opted for an epidural, and they had a greater number of assisted vaginal deliveries than the control group participants. The 24 hr postpartum results showed that the neonates of the experimental group participants had nonsignificantly higher Apgar scores than those of the women in the control group. Group differences in neonatal weight were not significant. The results of the present study indicate that hypnosis is useful for assisting pregnant women during labor and the postpartum period.

Matched MeSH terms: Labor, Obstetric/physiology*
Membrane sweeping at initiation of formal labor induction: a randomized controlled trial

Tan PC, Jacob R, Omar SZ

Obstet Gynecol, 2006 Mar;107(3):569-77.
PMID: 16507926

To determine the benefit of membrane sweeping at initiation of labor induction in conjunction with formal methods of labor induction.

Matched MeSH terms: Labor, Obstetric/physiology*