Chemicals related to mood swings are:

In the human reproduction, the uterus will

The joining of two special cells, one from each parent is called

What determines if a baby will be a boy or a girl?

The purpose of sperm is to:

What is ovulation?

Which of the following is NOT a physical development caused by puberty?

________, the stage of birth which follows a series of strong muscular contractions which cause the cervix to open enough for the baby to fit through.

Which of the following is the correct sequence in the development of an embryo?

The male hormone ____ is produced in the testes and regulates the development of male traits and sperm

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