Related Experiment Video
Updated: Aug 5, 2026

Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse (POP) Quantification System
Published on: September 20, 2018
Childhood precursors of age at first intercourse for females
J R Udry1, J Kovenock, N M Morris
1Carolina Population Center, University of North Carolina at Chapel Hill 27516-3997, USA.
Abstract:
Age at first intercourse for a sample of adult white women using variables measured during childhood is predicted. Childhood predictors were measured at birth, and ages 5 and 9-11, using existing public-use data on the women. Median age at first intercourse for the sample was 17.5 years. Early family predictors, early developmental characteristics, and temperamental characteristics during childhood together could predict about a fourth of the variance in age at first intercourse. The strongest predictors were motor skills and nightmares at age 5, church attendance with family at age 9, and domineering and mature personality at age 9.
More Related Videos
Related Concept Videos
Oogenesis
Meiosis I
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
Development of the Sexual Organs in the Embryo and Fetus
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the male...
Infertility in Females
Endometriosis, a condition characterized by abnormal growth of endometrial...
Psychosexual Theory of Development
The Five Stages of Psychosexual Development
Freud's psychosexual...
Socioemotional Experience and Gender Development

