Weird Sex Queen Bees Flatworms Clownfish Anglerfish

Um- mom-dad can I borrow the car?

Intercourse

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 - 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

Reproduction - Blastocyst Implantation

Pregnancy - Trying to Conceive 1. What percent conceive the first month? – 30% 2. When is your best chance to conceive? – within 24 hours of ovulation 3. So when should you have sex? - Egg is viable for about 24 hours and sperm can live for a 1-3 days in a woman’s body 4. Does the position matter?

Pregnancy - Week One

Pregnancy - Week 4

Pregnancy - Week 8 Trimesters:

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 Twins Typically paternal but did not completely separate Abigail & Brittany: From % increase - why? 1. Fertility Drugs 2. In Vitro Fertilization

In Vitro & Multiple Births dependent on age

Tiger & Piglets