1. Pregnancy and the Stages of Pregnancy

4. Stages of Pregnancy Slide Show http://www.medicinenet.com/stages_of_p regnancy_pictures_slideshow/article.htm http://www.medicinenet.com/stages_of_p regnancy_pictures_slideshow/article.htm

5. The Beginning of the Life Cycle FERTILIZATION: within seconds of fertilization, the surface of the egg changes so that no more sperm can enter the egg FERTILIZATION: within seconds of fertilization, the surface of the egg changes so that no more sperm can enter the egg In the first week of fertilization, the fertilized egg undergoes many cell divisions and travels to the uterus In the first week of fertilization, the fertilized egg undergoes many cell divisions and travels to the uterus

7. The Zygote This is the united egg and sperm is called a zygote This is the united egg and sperm is called a zygote Within 36 hours the zygote is still traveling through the fallopian tubes and begins dividing Within 36 hours the zygote is still traveling through the fallopian tubes and begins dividing

8. Embryo: About nine weeks after fertilization Embryo: About nine weeks after fertilization Blastocyst: About 5 days after fertilization, the embryo reaches the uterus. It floats free for a few days and is make up of about 50 to 100 cells. It is no longer a solid mass of cells but a sphere of cells surrounding a hollow center Blastocyst: About 5 days after fertilization, the embryo reaches the uterus. It floats free for a few days and is make up of about 50 to 100 cells. It is no longer a solid mass of cells but a sphere of cells surrounding a hollow center

9. Implantation Implantation is, once the blastocyst forms it attaches itself into the wall of the uterus Implantation is, once the blastocyst forms it attaches itself into the wall of the uterus

10. Amniotic Sac This develops around the embryo, this is a fluid filled bag This develops around the embryo, this is a fluid filled bag This sac continues to grow inside as the embryo grows This sac continues to grow inside as the embryo grows

11. Placenta This holds the embryo to the wall of the uterus. This holds the embryo to the wall of the uterus. Mother’s blood and nutrients lead to tiny blood vessels from the placenta to the uterus Mother’s blood and nutrients lead to tiny blood vessels from the placenta to the uterus

12. Umbilical Cord About 25 days after fertilization, this is a ropelike structure that develops between the embryo and placenta About 25 days after fertilization, this is a ropelike structure that develops between the embryo and placenta

13. First Trimester (0-12 weeks)

14. First Trimester Symptoms body will begin to undergo changes as the body prepares for the pregnancy body will begin to undergo changes as the body prepares for the pregnancy Breast will swell and begin to become tender Breast will swell and begin to become tender Women will feel fatigued ( tiredness) this will pass over time Women will feel fatigued ( tiredness) this will pass over time Morning sickness due to increase levels and changes in hormones Morning sickness due to increase levels and changes in hormones

15. First Trimester Symptoms frequent urinations ( uterus grows and begins to press on the bladder) frequent urinations ( uterus grows and begins to press on the bladder) Constipation ( growing uterus presses on rectum and intestines – digestive system is slowed do to the increase in progesterone) Constipation ( growing uterus presses on rectum and intestines – digestive system is slowed do to the increase in progesterone) Dizziness (extra blood is going down towards uterus and legs) Dizziness (extra blood is going down towards uterus and legs)

16. First Trimester Symptoms Increased heart rate ( cardiac volume increases 40-50% during pregnancy) Increased heart rate ( cardiac volume increases 40-50% during pregnancy) heart burn and indigestion (due to massive increase of hormone production, causes gastrointestinal system to relax) heart burn and indigestion (due to massive increase of hormone production, causes gastrointestinal system to relax) Appetite increase and cravings Appetite increase and cravings

17. Second Trimester Symptoms Weeks 13-28 Skin changes, stretch marks, and increase of belly size ( uterus has grown to height of belly button – skin pigmentation changes due to hormone changes disappears after pregnancy) Skin changes, stretch marks, and increase of belly size ( uterus has grown to height of belly button – skin pigmentation changes due to hormone changes disappears after pregnancy) Abdominal and lower back pain Abdominal and lower back pain Nose and gums bleed (increase in hormones- affects mucus membranes) Nose and gums bleed (increase in hormones- affects mucus membranes)

18. Second Trimester Symptoms Weeks 13-28 Itching and tingling (due to swelling of tissues in the body) Itching and tingling (due to swelling of tissues in the body) Difficulty sleeping Difficulty sleeping Fetal movement Fetal movement Some of the symptoms of first trimester may also still be present Some of the symptoms of first trimester may also still be present

19. Third Trimester Weeks 29-40 Hair begins to grow at a faster rate due to increases circulation and metabolism from hormones Hair begins to grow at a faster rate due to increases circulation and metabolism from hormones Increase in temperature ( baby growing radiates heat as well as 20% increase in metabolic rate) Increase in temperature ( baby growing radiates heat as well as 20% increase in metabolic rate) Increased frequency of bladder Increased frequency of bladder Swelling ( retention of water) Swelling ( retention of water)

20. Third Trimester Weeks 29-40 Fatigue ( carrying more weight than used to) Fatigue ( carrying more weight than used to) Braxton Hicks contractions ( usually begin after the 20 th week, painless tightening of the uterus to prepare the body for labor) Braxton Hicks contractions ( usually begin after the 20 th week, painless tightening of the uterus to prepare the body for labor)

21. http://www.pregnancy-info.net/labor_and_birth_home.html