The relationship between the timing of coitus and sex determination in humans

Date

3-1991

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Adelina A. Barrion

Abstract

The hypothesis is that the sex of an offspring is predetermined prior to conception depending on whether the ovum is fertilized by an X—or Y-bearing sperms. The migration rate and survival of both X— and Y—bearing sperms are influenced by the varying pH of the female reproductive tract during the different phases of menstrual cycle. Acidic human cervical mucus which favors the survival of X-sperms was determined to be high in the female reproductive tract during the pre—ovulation period, thus, a female child is most likely conceived. The reproductive tract at its basic pH during the ovulation and post—ovulation periods ensures the survival of more Y--sperms. thus, a male offspring is most probably conceived. The hypothesis was tested based on the responses to interviews conducted to 100 women samples who were in their 0th and 9th month of pregnancy and had regular menstrual cycle prior to conception. Results were non-parametrically analyzed using the Phi Correlation Test. A highly significant correlation value at .001 was obtained between the predicted sex and the actual sex of the child. Results also showed that there was no correlation between the Chinese calendar and the actual sex of the offspring.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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