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ESTROGEN AND PROGESTIN METABOLISM IN PREGNANCY. I. SPONTANEOUS AND INDUCED LABOR1
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References
1941
Year
Hormonal ContraceptiveFertilityReproductive HealthGynecologyMenstrual CycleHigh-risk PregnancyReproductive EndocrinologyFalse Labor ContractionsReproductive MedicineObstetricsSpontaneous OnsetWomen's PhysiologyPublic HealthPhysiological FactorsInfertilityPreterm LaborMaternal ComplicationMaternal HealthMaternal-fetal MedicineEndocrinologyMidwiferyPostpartum HemorrhageAbortionPhysiologyPregnancyMedicineWomen's Health
THE PHYSIOLOGICAL FACTORS concerned in the I spontaneous onset of labor have been the sub-ject of many investigations. Snyder, reviewing the literature in 1938 (1), concluded that the termination of pregnancy was subject to a timing mechanism similar to that which characterizes the length of the ovarian cycle and primarily under hormonal control. The present study was conducted in order to determine whether or not any changes in estrogen and progestin metabolism which might be of etiological significance preceded and accompanied labor and delivery. It was important, in this connection, to follow any such changes in induced as well as spontaneous delivery. The findings on urine from a woman who had false labor contractions over an 8-day period also yielded considerable pertinent information.