1. Pregnancy!

2. But first, a tale of texting to the wrong number, courtesy of Tumblr...

5. A Few Terms:
Zygote: The cell formed by the union of a male sex cell (a sperm) and a female sex cell (an ovum). The zygote develops into the embryo
Trimester: A period of three months (usually used to describe periods of time during a pregnancy, but not always
Placenta: a flattened circular organ in the uterus of pregnant mammals which nourishes the fetus through the umbilical cord. (It is attached to the umbilical cord.)

6. Last Time on Awkward Talks with Mr. McIlvaney...
Sperm travel from vagina to fallopian tube
Sperm try to penetrate egg’s coating
Sperm + egg fuse (sperm’s nucleus enters egg)
Gestation = 38 weeks (9 months)

7. First Trimester (0-3 months)
Zygote divides in fallopian tube
Implants in the uterus (no menstruation/period if pregnant)
Amniotic sac forms (fluid filled) in the uterus
Placenta forms
Brain/nervous system develop
Heart beats, sex organ form
Urination may increase from pressure on the bladder
Nausea and vomiting common

8. Second trimester (4-6 months)
Fetus grow from 8-30 cm
Movement of fetus can be felt
Fingers and toes obvious
Fetus practices breathing

9. Third Trimester (7-9 months)
fetus increases in weight
Organs functioning
Fetus has sleeping/walking patterns
Reacts to external stimuli
Lungs mature

10. Changes During Pre

11. Birth - YAY Labour begins Cervix dilates and opens
Amniotic sac breaks and fluid is released
Cervix widens to 10cm
Uterine contractions move baby out (head first)

12. Baby is BORN!
Baby takes first breath, umbilical cord is cut and tied

13. Stem Cells and Differentiation
Differentiation: process of growing from unspecialized cells into many different specialized cells

14. Zygote divides into about 150 unspecialized cells
This ball has stem cells

15. Stem Cells: unspecialized cells that have the ability to reproduce themselves

16. TWINS!
There are two types:
Identical and fraternal twins

17. Fraternal twins
Occur when two eggs are released at the same time (usually one from each ovary)
Both eggs are fertilized by different sperm and develop in own placenta
They have different genetic material

18. Identical Twins
Result of one fertilized egg that splits at the zygote or early embryo stage
Each daughter cell develops into an embryo
Identical twins are the same gender and have identical DNA