ANS002 Fall 2012

REPRODUCTION Reproduction is the biological process by which new "offspring" are produced from their "parents” Two main types: sexual and asexual Sexual reproduction typically requires the involvement of two gametes, one each from opposite type of sex

REPRODUCTION Why is it important?

FERTILISATION Fertilisation is the fusion of gametes to produce a new organism.

Sperm – male gamete Motility Sperm provides half of the genome for an offspring Source: sperm-or-spermatozoa-showing-the-heads-midpieces-and-long-flagella-sem.htm

Hormone of male reproduction Testosteron

Oocyte – Female gamete Provides: half of the genome nutrition, other factors needed for development Source:

Hormone of female reproduction Follicle stimulating hormone - FSH Luteinizing hormone – LH In accordance with ovary cycle, menstrual cycle Important in assisted reproductive technology

FERTILISATION Fertilisation is the fusion of gametes to produce a new organism. The human oocyte at the moment of fertilization. Image: National Museum of Health and Medicine

One and only one sperm can penetrate and fertilize with the oocyte

Development stages Development of the Preimplantation Blastocyst in Humans. (© 2001 Terese Winslow)

Newborn_baby_after_Caesarean-SPL.jpg Welcome to the world!!!

Short animated video of human fertilization process

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