the following sections describe the female reproductive system ( including vulva , vaginal and ectocervical squamous epithelium , metaplastic epithelium of the transformation zone , endocervix and cervical mucus , endometrium , iuds , tube , ovary , and mammary gland ) , the male reproductive system ( male sex organs , spermatozoa ) and the conceptus ( placenta , embryogenesis ) .
C0700038
female reproductive
C0042232
vaginal