Is it true that we all start out as female in the womb

Question

For the first two months?

Any links on the matter would be appreciated

Answer 1

Yes.

Up to about six weeks the s*x of the individual is not formed but will develop into a female unless a Y chromosome is present.. In the absence of a Y chromosome development of the embryo proceeds to form a female (XX). In the presence of a Y chromosome development produces a male (XY).

Answer 2

Yes.  Muellerian ducts form in all fetuses.  At around week 7, the TDF (testis determining factor) starts being expressed in males (it's found on the Y chromosome) and testis development begins.  The testes then produce Anit-muellerian hormone which will cause the ducts to regress.  

If TDF is not expressed and no testes are formed, no AMH will be produced and the muellerian ducts will differentiate into fallopian tubes, uterus, and part of the v****a.

By the way, it's not the Y chromsome that determines maleness, it's the TDF region that is typically on the Y chromosome.  If you have a Y chromosome missing the TDF, you will be female.  And, if you have two X chromsomes and one has a TDF, you will be male.  The exchange of the TDF can (and has) happen during meiosis in the production of sperm.

Answer 3

I think so. Then we start to develop in some weird way. Its kinda weird to think my boyfriend was once a girl.

Answer 4

False.  The Y chromosome determines s*x, and the zygote becomes genetically male or female at the instant of fertilization.

Answer 5

A male fetus has both X and Y chromosomes since day 1. The male genital is produced only when male s*x hormomes are present. If the male fetus (XY) fails to produce male s*x hormones, it will develop into a female body, even though it has the Y chromosome.

Answer 6

Sort of, but not exactly.

See, we start developing as female, but that doesn't mean that we all ARE female before that point. Everything starts out developing as a female until the Y chromosome releases the hormones that create males. We are technically male from the moment we were conceived, however, as the Y chromosome was always present, it's just that it doesn't come into play until later on in the pregnancy.