LO9 Deliveries Flashcards
- Fertilization
: Occurs in distal third of fallopian tube
- Implantation
Occurs in the uterus
- Placenta
begins to develop after 4th week
- Umbilical cord
o Has 2 arteries 1 vein
Fetal circulation
- Arteries carries the deoxygenated blood back to the placenta
- The veins carry oxygenated blood back to baby
- Ductus venosus
duct that opens when blood comes in
- Blood will leave from left atrium to lungs and return back through ductus arteriosus
- Gestation usually averages
40 weeks from time of fertilization to delivery
24 Weeks
- Sex organs visible
- Covered with lanugo and vernix
- Breathing by inhaling amniotic fluid into lungs
40 Weeks
- Surfactant present
- Baby now about 7.5 lbs
- Week 35-36 baby gain .5lb per week
- Placenta detaches & umbilical cord ceases functioning as child takes first breath of air
- Child’s breathing triggers changes in the structure of the heart and bypass arteries which will force all blood to travel through the lungs
maternal cardiac output increases to approximately
40% reaching its maximum capacity approximately 22 weeks and then declines approximately 20%
- A pregnant woman’s heart
increases slightly due to increased cardiac workload
is displaced upward, forward and to the left with a slight rotation in its long access which causes the apex of the heart to shift laterally
- Enlarged uterus contributes
to slowed venous return, pooling, dependent edema, haemorrhoids and varicose veins
- Lying supine position maternal cardiac output can increase as much is
- Maternal oxygen consumption increases by
25%
20% of 40% above nonpregnant levels entitle volume increases gradually to approximately 40%
- Primigravida
: A woman who is pregnant for the first time
- Multigravida
: A woman who has had two or more pregnancies
