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Vaginal intercourse to promote labour onset is biologically plausible. Oxytocin release during female orgasm, cervix mechanical stimulation and the effect of semen's prostaglandins are possible involved mechanisms. The investigators propose to evaluate the effect of vaginal intercourse on spontaneous labour at term.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Vaginal coitus group | Pregnant women assigned to have vaginal coitus at least twice a week |
| |
| Control group | Pregnant women assigned to have no vaginal intercourse |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Vaginal intercourse | Behavioral | vaginal intercourse at least twice a week |
|
| Measure | Description | Time Frame |
|---|---|---|
| Spontaneous labour onset at term | Spontaneous labour was considered to be established when there were regular contractions and at least 3cm of cervical dilation. | Spontaneous labour onset between 37 and 42 weeks of pregnancy |
| Measure | Description | Time Frame |
|---|---|---|
| Gestational age at delivery | Gestational age at delivery (between 37 and 42 weeks of pregnancy) | |
| Mode of delivery | Route of delivery - vaginally or cesarean | Mode of delivery (vaginal or cesarean delivery) up to 42 weeks of pregnancy |
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Inclusion Criteria:
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Pregnant women attending to antenatal appointment in our Obstetric Unit
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| Name | Affiliation | Role |
|---|---|---|
| Catarina Castro, Dr | Hospital de Santa Maria | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Hospital de Santa Maria | Lisbon | Portugal |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 25033717 | Derived | Castro C, Afonso M, Carvalho R, Clode N, Graca LM. Effect of vaginal intercourse on spontaneous labor at term: a randomized controlled trial. Arch Gynecol Obstet. 2014 Dec;290(6):1121-5. doi: 10.1007/s00404-014-3343-0. Epub 2014 Jul 18. |
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| ID | Term |
|---|---|
| D003075 | Coitus |
| ID | Term |
|---|---|
| D012725 | Sexual Behavior |
| D001519 | Behavior |
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| ID | Term |
|---|---|
| D012723 | Sex |
| ID | Term |
|---|---|
| D055703 | Reproductive Physiological Phenomena |
| D012101 | Reproductive and Urinary Physiological Phenomena |
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| Interval between recruitment and delivery | number of days between patients study recruitment and delivery (patients were included in the study at 38 weeks of pregnancy and followed until delivery; if spontaneous labour did not occur labour induction was scheduled during the 41th week of pregnancy) | number of days between patients study recruitment and delivery (maximum period of 28 days - between 38 and 41/0-6 weeks/days of pregnancy) |