That's absolutely incorrect;

"A 46,XY mother who developed as a normal woman underwent spontaneous puberty, reached menarche, menstruated regularly, experienced two unassisted pregnancies, and gave birth to a 46,XY daughter with complete gonadal dysgenesis...

Herein we report the extraordinary case of *a fertile woman* with normal ovaries and a *predominantly 46,XY ovarian karyotype*, who gave birth to a 46,XY female with complete gonadal dysgenesis. The karyotype of this phenotypically normal mother was 46,XY in blood, 80% 46,XY and 20% 45,X in cultured skin fibroblasts, and 93% 46,XY, 6% 45,X, and &lt;1% 46,XX in the ovary. The family pedigree on the mother’s side was notable for the presence of seven individuals over four generations with either sexual ambiguity, infertility, or failure to menstruate, including one individual with documented 45,X/45,XY mixed gonadal dysgenesis. Both the mother and the 46,XY daughter were screened for mutations in a number of genes known to be involved in mammalian testis determination. In all genes screened (see below), the open reading frame was found to be normal. This suggests that a mutation in a novel sex-determination gene or a gene that predisposes to chromosomal mosaicism may be responsible for the phenotype in this family...

Maternity testing was performed by using the short tandem repeat kit AmpFlSTR Profiler Plus (PE Applied Biosystems, Foster City, CA). Nine short tandem repeats were analyzed (D3S1358, VWA, FGA, D8S1179, D21S11, D18S51, D5S818, D13S317, and D7S820) using thermal cycling conditions, capillary electrophoresis was performed according to the manufacturer’s instructions, and products were analyzed using the ABI 3100 capillary electrophoresis instrument and GeneScan software (Applied Biosystems)."

You cannot determine sex by examining genetics.