6 doctors weighed in:

Does the guy determine the sex of the baby?

6 doctors weighed in
Dr. James Ferguson
Pediatrics
5 doctors agree

In brief: Yes

Maternal contribution to the offspring is limited to her female sex chromosome.
Since a pair of x's make her female, that is all she can put into an egg. A male has an x and a y chromosome, so ~half his sperm carry an x and half carry a y. At fertilization the mothers x joins dad's x or y and a girl or boy will result.

In brief: Yes

Maternal contribution to the offspring is limited to her female sex chromosome.
Since a pair of x's make her female, that is all she can put into an egg. A male has an x and a y chromosome, so ~half his sperm carry an x and half carry a y. At fertilization the mothers x joins dad's x or y and a girl or boy will result.
Dr. James Ferguson
Dr. James Ferguson
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