pregnancy and childbirth. © 2010 mcgraw-hill companies. all rights reserved. understanding...
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Pregnancy and Childbirth
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© 2010 McGraw-Hill Companies. All Rights Reserved.
Understanding Fertility
• Conception – Involves the fertilization of a women’s egg by a man’s
sperm– Each month a women’s ovaries release an egg
• 24 hours if not fertilized– 3-4 days - the egg travels through the fallopian tubes– Egg not fertilized – Millions of sperm– Sperm release an enzyme– Egg and sperm each carry 23 chromosomes– Ovum, blastocyst, embryo, fetus
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Pregnancy• 3 periods of about 3 months (13 week trimesters)• Tests
– Home pregnancy tests– Human chorionic gonadotropin (HCG)– Two weeks after fertilization
• Early signs and symptoms– Missed menstrual period– Softening of the uterus
• Hager’s sign– Slight bleeding– Nausea– Breast tenderness– Increased urination– Sleepiness, fatigue and emotional upset
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Continual Change in the Women’s Body• Uterus size
– First 3 months, the uterus enlarges to about three times its nonpregnant size
– 4th month, large enough to make abdominal protrude– 7th-8th month, pushes up into the rib cage
• Breast changes– 8th week– 10th week
• colostrum
• Muscles and Ligaments loosen• Weight Gain
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Fetal Development
• First Trimester– Blastocyst
• Inner cells divide into three layers• One layer – inner body parts• Middle layer – muscle, bone, blood, kidneys, and sex
glands• Third layer – skin, hair, and nervous tissue
– Embryo - End of second week– All major body structures are formed between 2nd and
9th week– 2nd Month - Fetus
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Fetal Development
• Second Trimester
– Fetus grows to about 14 inches and 2 pounds
• Third Trimester
– Fetus gains protective fat layers, Respiratory and Digestive organs develop
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Diagnosing Fetal Abnormalities
• Ultrasonography (Ultrasound)– High frequency sound waves
• Amniocentesis– Fluid removal from the uterus
• Chorionic Villus sampling– Removal of tiny section of chorionic villi
• Quadruple marker screen (TMS)– Maternal blood test– Analyze four hormone levels and compared to appropriate
standards• Fetal programming
– Conditions in the womb may influence the risk of adult diseases
– Amniocentesis, CVS, and TMS– Chromosomal, genetic and other abnormalities
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The Importance of Prenatal Care
• Regular medical checkups• Blood tests• Prenatal nutrition• Avoidance of drugs, and other environmental hazards:
– Teratogens• 1st trimester • Congenital malformations
– Alcohol– Tobacco– Caffeine– Drugs– STD’s and other infections
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The Importance of Prenatal Care
• Activity and exercise– Moderate exercise program
• 30 minutes most days• Cardiovascular exercises
– Kegal Exercises– Prenatal exercise classes
• Preparation for childbirth
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Complications of Pregnancy and Pregnancy Loss
• Ectopic pregnancy• Spontaneous Abortion, or miscarriage
– Stillbirth• Preeclampsia/eclampsia• Placenta Previa• Placental Abruption• Gestational Diabetes• Preterm Labor• Labor Induction• Low-birth Weight (LBW)
– 5.5 LBS.• Infant Mortality
– SIDS• Coping with loss
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Childbirth
• Choices in childbirth– Who is going to assist with delivery?
• Physician– High risk?
• Certified Nurse-Midwife
– Where is the baby going to be delivered?• Hospital• Home
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Labor and Delivery
• Entire process 2-36 hours.• First stage of Labor.
– Average13 hours for a first birth.– Cervix is completely dilated (10 centimeters)– Hormonal changes.– Contractions. (30 seconds and occur every 15-20
minutes)– Mucus plug is expelled and amniotic sac may rupture.– Transition:
• Contractions may last 60-90 seconds and be 1-3 minutes apart
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Childbirth• Second Stage of Labor
– Baby slowly pushed into birth canal– Baby squeezes through pelvis– Head is usually delivered first– Umbilical cord is cut
• Third Stage of Labor– Delivery of the placenta– Stage typically lasts 5-30 minutes
• Apgar Scale of the Baby– Heart rate– Respiration– Color– Reflexes– Muscle tone– Total score is between 0 and 10
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Pain Relief During Labor and Delivery
• Childbirth preparation courses– Breathing and relaxation techniques– Lamaze or Bradley
• Epidural
• Narcotics– Fentanyl or demeral– Provide less pain relief than a epidural
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Cesarean Deliveries
• 2006 about 31.1% of babies born in the U.S.
• Surgical removal of the baby – Baby’s head too large
– Mother has a serious health condition
– Mother who is overweight or diabetes
– Difficult labor
– Fetal distress
– Dangerous infections
– 90% of cesarean mothers will have subsequent deliveries by cesarean
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Postpartum Period
• 3 months following childbirth.
• Critical family adjustment.
• Vaginal delivery leave hospital 1-3 days.
• Cesarean section 3-5 days.
• 6-8 weeks for the mother’s reproductive organs to return to prebirth condition
• Breastfeeding– About 74% of mothers breast-feed
– Lactation begins about 3 days post childbirth
– Colostrum prior to lactation
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