weird sex queen bees flatworms clownfish anglerfish
TRANSCRIPT
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