If each of the structures in the Reproductive Systems is missing or malfunctioned:

Male Reproductive system

Testes: Sperms cannot be produced and fertilisation will not occur as both female and male gametes are needed for fertilisation.

Penis: Will note be able to ejaculate and fertilisation will not occur.

Epidydimis: No storage for the sperm and there will be no muscle in it to ejaculate the sperms.

Glands: No seminal fluid will be produced, and it will be unable to neutralize acidity in female reproductive tract. Also, the sperm cannot swim freely towards the oviduct and no nutrients will be available to nourish the sperms, thus fertilisation will not occur.

Sperm duct: Will not be able to transport sperms from the epididymis to urethra and thus ejaculation and fertilisation will not take place.

Urethra: Sperms will not be able to pass through it and will not enter the vagina, fertilisation will not occur.

Female Reproductive System

Cervix: Menstrual blood will not be able to flow from the uterus into the vagina and the sperms will not be direct into the uterus during sexual intercourse.

Ovary: The female gametes will not be able to be produce and fertilisation will not occur.

Oviduct: Will not be able to deliver the mature ovum from ovary to the uterus and fertilisation will not occur.

Uterus: Will not be able to store the foetus.

Endometrium: The fertilized egg will not be able to implant on it and will not be able to undergo menstrual cycle.

Vagina: Will not be able to “receive” the penis during sexual intercourse and the menstrual blood will not be able to leave the body.