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J Assist Reprod Genet. 1999 Oct;16(9):492-4.

The ratio of X- and Y-bearing sperm in ejaculates of men with three or more children of the same sex.

Author information

1
Centre for Human Genetics, Edith Cowan University, Joondalup, Western Australia.

Abstract

PURPOSE:

The present study evaluated the proportions of X-bearing and Y-bearing sperm within the semen of donors who were the declared fathers of three or more sons or daughters.

METHODS:

The proportions of sperm were determined using dual-color fluorescence in situ hybridization to identify the X and Y chromosomes.

RESULTS:

The only difference observed was in semen volume. There was no increase in the proportion of Y-bearing sperm for men with only sons (49.7 +/- 1.3%) or of X-bearing sperm for men with only daughters (44.8 +/- 2.6%).

CONCLUSIONS:

A preponderance of either sons or daughters in a family cannot be explained simply by an altered ratio of X-bearing and Y-bearing sperm in the father's semen.

PMID:
10530404
PMCID:
PMC3455630
DOI:
10.1023/a:1020555101059
[Indexed for MEDLINE]
Free PMC Article

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