Weird SexQueen Bees

Flatworms

Clownfish

Anglerfish

Um- mom-dad can I borrow the car?

Intercourse

Female arousal and ejaculation: http://www.nhs.uk/Livewell/Goodsex/Pages/Sexualarousalinwomen.aspxMale arousal and premature ejaculationhttp://www.nhs.uk/Livewell/Goodsex/Pages/Malesexualarousal.aspx

Ovulation

Reproduction - Sperm & Egg

Reproduction - Sperm & Genetic Packaging

Semen - or ejaculatory fluid contains sperm, seminal and prostate gland fluids and is in a volume approximately equal to a teaspoon of fluid or 3mls

Reproduction - Sperm1. Sperm contain the X or Y chromosome that determines the sex of the baby

2. An ejaculation may contain 360 million sperm. Normal fertility requires 60 million/ml and below 10 thousand/ml conception is likely to be impossible.

3. Sperm may live for several months in the male but for only 1-3 days inside the female

4. Assisting sperm are needed to break down surface cells on the ovum

Reproduction - Blastocyst Implantation

Pregnancy - Trying to Conceive

What percent conceive the first month? – 30%When is your best chance to conceive?So when should you have sex?Does the position matter?

Egg is viable for about 24 hours and sperm can live for a 1-3 days in a woman’s body

Pregnancy - Week One

Pregnancy - Week 4

Pregnancy - Week 4

Pregnancy - Week 8

Trimesters:http://www.wpclinic.org/parenting/fetal-development/first-trimester/

Reproduction – Fraternal or brotherly (left) Vs Paternal or from the father (right)

Reproduction - Multiple Births

Fraternal Twins”Two egg and two sperm

Paternal or Identical Twins:One egg and one sperm

Conjoined or Siamese TwinsTypically paternal but did not completely separate

From 1980-2000 74% increase - why?

•Fertility Drugs

Reproduction - Multiple Births

Tiger & Piglets