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Time to Pregnancy clinical trials

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NCT ID: NCT04068428 Completed - Infertility Clinical Trials

Reproductive Health of Couples of Childbearing Age: a Community Based Prospective Cohort Study

ReH-CP
Start date: July 26, 2019
Phase:
Study type: Observational

This community based prospective cohort study was established to investigate the fecundability of couples of childbearing age. Data are collected regarding age, body mass index, education, menstrual regularity as well as childbearing history. Results of routine examination of leucorrhea, blood glucose, liver function of the female spouse, and semen analysis of the male spouse are obtained from the National Free Pre-conception Check-up Projects (NFPCP) in China. Couples recruited will be followed every 6 months for at least 1 year, and their time to pregnancy as well as behavior of seeking medical care would be recorded. Blood sample and/or information of antral follicle count would be collected from participants who fail to conceive after 12 months of attempts.

NCT ID: NCT01132924 Completed - Gestational Age Clinical Trials

A Follow-up of the Early Pregnancy Study Cohort.

Start date: May 5, 2010
Phase:
Study type: Observational

Background: - The purpose of the 1982 1986 North Carolina Early Pregnancy Study was to determine how often pregnancy loss occurs before women know they are pregnant. Women planning to become pregnant were asked to collect daily urine specimens and fill out daily diaries of their intercourse and menstrual bleeding. Researchers are interested in re-contacting this cohort to gather new information and to examine how accurately women can recall events that occurred earlier in their lives. Objectives: - To follow-up with and gather additional information from women who were involved in the Early Pregnancy Study. Eligibility: - Women who participated in the 1982 1986 North Carolina Early Pregnancy Study. Design: - Participants will receive and complete a questionnaire that includes the following topics: - Their pregnancy history. - The infant s birth, including method of delivery and induction of labor. - Early life exposures such as their own birth weight and their parents ages at their birth. - Tap water use during their attempt to conceive - General description of their behaviors during their participation in the original study, these include: physical activity, caffeine, alcohol, and soy food consumption. - Participants will return the surveys to the researchers in the stamped envelope provided with the questionnaire....