1. Weird Sex Queen Bees Flatworms Clownfish Anglerfish

2. Um- mom-dad can I borrow the car?

4. Intercourse Female arousal and ejaculation: http://www.nhs.uk/Livewell/Goodsex/Pages/Sexualarousalinwomen.aspx http://www.nhs.uk/Livewell/Goodsex/Pages/Sexualarousalinwomen.aspx Male arousal and premature ejaculation http://www.nhs.uk/Livewell/Goodsex/Pages/Malesexualarousal.aspx

5. Ovulation

6. Reproduction - Sperm & Egg

7. 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

8. Reproduction - Sperm 1. 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

9. Reproduction - Blastocyst Implantation

10. 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

11. Pregnancy - Week One

12. Pregnancy - Week 4

14. Pregnancy - Week 8 Trimesters: http://www.wpclinic.org/parenting/fetal-development/first-trimester/

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

16. Reproduction - Multiple Births Fraternal Twins” Two egg and two sperm Paternal or Identical Twins: One egg and one sperm Conjoined or Siamese Twins Typically paternal but did not completely separate From 1980-2000 74% increase - why? Fertility Drugs

17. Reproduction - Multiple Births

18. Tiger & Piglets