Child Development: Pregnancy and Childbirth Flashcards
zygote
fertilized egg
ectopic pregnancy
when the zygote stays in the fallopian tube
lightening
when the baby moves down into the mother’s pelvis
quickening
feeling of the baby moving within the mother’s stomach like a “flutter”
how does a baby develop during prenatal development?
from a single cell into a complex being
function of uterus
to hold the baby during pregnancy
aka the womb
function of the placenta
to give the baby food and oxygen
function of the umbilical cord?
brings nourishment to the baby and takes waste products away
function of amniotic fluid
it protects the developing baby
what does the cervix do during labor?
it dilates (to 10cm or 4in) to allow the baby’s passage down to the birth canal
first stage of prenatal development?
how long does it last?
what happens? (3)
period of the zygote
2 weeks
- zygote travels down the fallopian tube and attaches to the lining of the uterus
- develops by cell division
- zygote grows to the size of a pinhead
what will happen during an ectopic pregnancy? (3)
the zygote will stay in the fallopian tube
the zygote will die
the fallopian tube is either cut out, or it will explode
what is the second stage of prenatal development?
how long does it last?
what happens? (4)
the period of the embryo
from the 3rd - 8th week of pregnancy
- major organs form and develop
- the doctor will be able to hear the baby’s heartbeat with a fetal monitor *
- amniotic fluid forms around the embryo, which protects and cushions the baby
- the placenta develops and is rich in blood vessels
what is the third stage of prenatal development?
how long does it last?
what happens? (4)
period of the fetus
from the 8th week - birth
- everything is growing and developing
- quickening occurs around the 4th/5th month*
- the mother experiences lightening by the 9th month
- baby is ready to be born after 40 weeks or starting from the last day of your last period
when is the fetus able to live outside of the womb?
by the 7th month
what is the baby protected from in the womb?
amniotic fluid
lanuga
vernix caseosa
how many chromosomes does a normal human being contain?
23 chromosomes
how is the sex of the baby determined?
by the male’s sperm
what chromosomes do the women contain?
the men?
women - xx
men - xy
difference b/t fraternal and identical twins
fraternal - 4
identical - 4
fraternal = 2 eggs, both fertilized; not identical, can be either gender though
identical = egg splits in half and grow into separate embryo; same sex and gender
why would a couple be unable to have a baby? (3)
not ovulating
male doesn’t have enough sperm
not the right environment for the sperm to swim to the egg
options for infertile couples? (5)
adoption
artificial insemination
in-vitro fertilization (test-tube babies)
ovum transfer
surrogate mother
what is artificial insemination
when sperm is injected into a woman’s uterus with a syringe
what is in vitro fertilization (test tube baby)
where the egg is removed and fertilized with sperm in a petri dish and then implanted into the uterus