CLD 101 Chapter Notes - Chapter 2: Skin Fold, Meiosis, Color Blindness

• School: Ryerson University
• Department: Early Childhood Studies
• Course: CLD 101
• Professor: Sejal Patel

Document Summary

Fertilization: union of sperm and ovum to produce a zygote; also called conception. At birth a female is believed to have about 2mill. Immature ova each ovum in its own tiny sac or. Ovulation occurs at least once every 28 days. After being expelled from the ovary, ovum is swept through fallopian tubes by tiny hair cells (cilia) towards the uterus/womb follicle. Sperm are produced in the testicles (testes), or reproductive glands at a rate of several hundred million a day. Deposited in the vagina through the opening of the uterus (cervix) into fallopian tubes. Infertility: inability to conceive after 12 months of trying ages 15 to 44 estimated 12-16% The most common cause of infertility in men is a low sperm count or insufficiently motile sperm. A sperm count that in 60mill to 200mill per ejaculation, makes conception unlikely. Some cases of male infertility seem to have a genetic basis. Mucus in the cervix prevents sperm from penetrating.