Female and male embryos have a pair of sexually undifferentiated gonads and two sets of primitive duct structures. These are known as the and ducts.

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The correct terms are Mullerian and Wolffian ducts. In early embryonic development, both female and male embryos have these two sets of ducts. The development into male or female reproductive organs depends on the presence or absence of certain hormones. The Mullerian ducts develop into female reproductive structures in the absence of male hormones, while the Wolffian ducts develop into male reproductive structures in the presence of male hormones.

Female and Male Embryos Have a Pair of Sexually Undifferentiated