Presentation on theme: " A new Beginning Fertilization- when the sperm from a man and the ovum from a woman join together, the genes of the mother and the father combine "— Presentation transcript:
A new Beginning Fertilization- when the sperm from a man and the ovum from a woman join together, the genes of the mother and the father combine Implantation- the attachment of the developing cells to the uterus Pregnancy- the time when the new cell formed during fertilization grows and develops into a baby in the women’s uterus. Embryo- the developing human for the 1 st 8 weeks Fetus- the developing human from week 8 until birth.
Changes in the Mother’s Body Once pregnant, woman’s uterus produces certain hormone Pregnancy test Some hormones make the women nausea (morning sickness) These hormones produce milk Enlarged abdomen Swelling legs Difficulty sleeping Become clumsy Emotional changes
Nourishing the fetus Placenta- an organ that grows in the woman’s uterus during pregnancy and allows nutrients, gases, and wastes to be exchanged between the mother and the fetus. Mother’s blood on one side, fetus’s blood on the other. Fetus gets nutrients from mother, and anything else.
Pregnancy lasts about 40 weeks, or 9 months Doctors divide the 9 months into 3 month periods called Trimesters If a baby goes until the end of the ninth month it is full term, before this it is premature
The first 12 weeks or 3 months of the pregnancy Begins as single cell, but continuously divides The heart is formed and begins to beat in the 4 th week, along with the brain and the limbs. 10,000 times bigger than 1 st Brain waves are detected All major organs are formed by week 8 Week 9 it is a fetus
4 th -6 th month, 13 th -27 th week Fetus is 3 inches long By end of trimester it will be 3 times this size Mother feels movement Week 14-18 the sex of the fetus is determined Fingers and toes grow nails Calcium in bones Hair is formed
7 th -9 th month, 28 th -40 th week Fetus is 10 inches long, 2 pounds Develops more muscles and begins to move more Fat deposited under skin Eyes open, lungs function Fetus can hear voices By end of this trimester the fetus is fully developed and ready to live in the outside world
Birth The passage of a baby from its mother’s uterus to outside her body Uterus contracts many times Labor- the process that lasts from the time contractions start until the delivery of the child and placenta. 3 stages of labor Caesarean Section- a procedure when the doctor surgically removes the baby and the placenta After birth the umbilical cord is cut for some women pregnancy, labor and delivery involve problems that range from mild to life threatening