No, the size is irrelevant for having sex.
Make sex cells are called sperm and female sex cells are called ova
Females do not have testes. Testes are male reproductive organs. The female equivalent of testes is ovaries, which produce eggs and female sex hormones.
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There are a few organs in the male reproductive system. These organs are located near the pelvic area on a man, and are used in reproducing. The male reproductive organs are: testes and penis.
The male sex cell, sperm, is found in the testes.
Only one sex hormone called testosterone.
Sex cells (sperm and eggs) are produced in the testes of males and the ovaries of females. In males, spermatogenesis occurs within the seminiferous tubules of the testes, while in females, oogenesis occurs within the follicles of the ovaries.
The testes is the only accessory sex gland on a dog.