Pregnancy and the Pregnancy and the Stages of PregnancyStages of Pregnancy

Stages of Pregnancy Slide ShowStages of Pregnancy Slide Show

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The Beginning of the Life The Beginning of the Life CycleCycle

FERTILIZATION: within seconds of FERTILIZATION: within seconds of fertilization, the surface of the egg fertilization, the surface of the egg changes so that no more sperm can changes so that no more sperm can enter the eggenter the egg

In the first week of fertilization, the In the first week of fertilization, the fertilized egg undergoes many cell fertilized egg undergoes many cell divisions and travels to the uterusdivisions and travels to the uterus

The ZygoteThe Zygote

This is the united egg and sperm is This is the united egg and sperm is called a zygotecalled a zygote

Within 36 hours the zygote is still Within 36 hours the zygote is still traveling through the fallopian tubes traveling through the fallopian tubes and begins dividingand begins dividing

Embryo: About nine weeks after Embryo: About nine weeks after fertilizationfertilization

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

ImplantationImplantation

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

Amniotic SacAmniotic Sac

This develops around the embryo, This develops around the embryo, this is a fluid filled bagthis is a fluid filled bag

This sac continues to grow inside as This sac continues to grow inside as the embryo growsthe embryo grows

PlacentaPlacentaThis holds the embryo to the wall of This holds the embryo to the wall of

the uterus .the uterus .Mother’s blood and nutrients lead to Mother’s blood and nutrients lead to

tiny blood vessels from the placenta tiny blood vessels from the placenta to the uterusto the uterus

Umbilical CordUmbilical Cord

About 25 days after fertilization, this About 25 days after fertilization, this is a ropelike structure that develops is a ropelike structure that develops between the embryo and placentabetween the embryo and placenta

First TrimesterFirst Trimester(0-12 weeks)(0-12 weeks)

First Trimester SymptomsFirst Trimester Symptoms

body will begin to undergo changes body will begin to undergo changes as the body prepares for the as the body prepares for the pregnancypregnancy

Breast will swell and begin to become Breast will swell and begin to become tendertender

Women will feel fatigued ( tiredness) Women will feel fatigued ( tiredness) this will pass over timethis will pass over time

Morning sickness due to increase Morning sickness due to increase levels and changes in hormoneslevels and changes in hormones

First Trimester SymptomsFirst Trimester Symptoms

frequent urinations ( uterus grows frequent urinations ( uterus grows and begins to press on the bladder)and begins to press on the bladder)

Constipation ( growing uterus Constipation ( growing uterus presses on rectum and intestines – presses on rectum and intestines – digestive system is slowed do to the digestive system is slowed do to the increase in progesterone)increase in progesterone)

Dizziness (extra blood is going down Dizziness (extra blood is going down towards uterus and legs)towards uterus and legs)

First Trimester SymptomsFirst Trimester Symptoms

Increased heart rate ( cardiac volume Increased heart rate ( cardiac volume increases 40-50% during pregnancy)increases 40-50% during pregnancy)

heart burn and indigestion (due to heart burn and indigestion (due to massive increase of hormone massive increase of hormone production, causes gastrointestinal production, causes gastrointestinal system to relax)system to relax)

Appetite increase and cravingsAppetite increase and cravings

Second Trimester SymptomsSecond Trimester SymptomsWeeks 13-28Weeks 13-28

Skin changes, stretch marks, and Skin changes, stretch marks, and increase of belly size ( uterus has increase of belly size ( uterus has grown to height of belly button – skin grown to height of belly button – skin pigmentation changes due to hormone pigmentation changes due to hormone changes disappears after pregnancy)changes disappears after pregnancy)

Abdominal and lower back painAbdominal and lower back painNose and gums bleed (increase in Nose and gums bleed (increase in

hormones- affects mucus membranes)hormones- affects mucus membranes)

Second Trimester SymptomsSecond Trimester SymptomsWeeks 13-28Weeks 13-28

Itching and tingling (due to swelling Itching and tingling (due to swelling of tissues in the body)of tissues in the body)

Difficulty sleepingDifficulty sleepingFetal movementFetal movementSome of the symptoms of first Some of the symptoms of first

trimester may also still be presenttrimester may also still be present

Third TrimesterThird TrimesterWeeks 29-40Weeks 29-40

Hair begins to grow at a faster rate Hair begins to grow at a faster rate due to increases circulation and due to increases circulation and metabolism from hormonesmetabolism from hormones

Increase in temperature ( baby Increase in temperature ( baby growing radiates heat as well as 20% growing radiates heat as well as 20% increase in metabolic rate)increase in metabolic rate)

Increased frequency of bladderIncreased frequency of bladderSwelling ( retention of water)Swelling ( retention of water)

Third TrimesterThird TrimesterWeeks 29-40Weeks 29-40

Fatigue ( carrying more weight than Fatigue ( carrying more weight than used to)used to)

Braxton Hicks contractions ( usually Braxton Hicks contractions ( usually begin after the 20begin after the 20thth week, painless week, painless tightening of the uterus to prepare tightening of the uterus to prepare the body for labor)the body for labor)

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