HDFS 3050 Exam 1 Questions with
Complete Answers
What are gametes? - Answer-Sex cells
Egg and Sperm
What is the process of fertilization? - Answer-Union of egg and sperm multiple sperm
attach to eggs
What are the 3 stages of prenatal development? - Answer-Zygotic Stage
Embryonic Stage
Fetal Stage
What occurs in the zygotic stage? - Answer-conception to 2 weeks
Zygote implants into the women uterus
Umbilical cord starts to form
What occurs in the embryonic stage? - Answer-2-12 weeks
Internal organs form
Heart beats (4 weeks)
Appendages form
Systems organize
What occurs in the fetal stage? - Answer-12-38 weeks
18 weeks= first kick felt, gender is apparent
Senses start to respond
Lanugo= start to develop hair
28 weeks= age of viability
How do we know babies learn in the womb? - Answer-Babies prefer their mothers voice
over others
Babies prefer their mothers language
Babies prefer certain sounds
Babies have accents
Babies have taste preferences
What are teratogens? - Answer-Environmental agents that can cause damage to the
developing embryo
What 3 things influence whether a baby will be affected by teratogens? - Answer-Dose:
Larger doses, more negative effects
Genetics: some babies are more affected than others
Age of developing baby: Sensitive period
, When are babies most sensitive to effects of teratogens? - Answer-Zygote: Largely
unaffected by teratogens
Embryonic stage: Highly sensitive period because of the formation of major organs
Fetal period: some affects can occur but are not serious
What are optimal prenatal conditions? - Answer-Good Health
Low stress
Good nutrition
Clean environment
What hormonal changes occur before labor? - Answer-CRH/Oxytocin: begin
contractions CRH send Cortisol
Cortisol: Signals the babys body to develop the lungs
Prostaglandins: Softens the cervix
What physical changes occur before labor? - Answer-Lightening: babys head drops into
the uterus causing cervix to soften
Bloody Show: As the cervix contracts and moves it releases the plug
Water Breaks: the sac is breaking
False Labor
What occurs during the stages of labor? - Answer-Stage 1: Dilation of cervix, thinning of
cervix. 12-14 hours. Contractions 10-20 minutes apart 15-20 seconds long
Transition: Strong Contractions 10cm 15-20 mins
Stage 2: pushing occurs during this stage 20-50 minutes. Crowning, Episiotomy
Stage 3: Delivery of the placenta
5-20 minutes
Physical Characteristics of a baby and mom - Answer-Baby- 7.5 lbs 14-20 inches long
Mom- 20-35lbs
Placenta- 2
Blood-4
Breast-2
Uterus-4
Fat-5-10
How have our attitudes and approaches to childbirth changed over time? - Answer-Late
1800s- Home Births
Post industrial revolution- Hospital births
1950s-1960s- natural birth
Today- Birth Centers with home births
How can parents prepare for childbirth? - Answer-Classes
Breathing
Labor Coach
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