Fetal Growth and Development(100% Verified)
When does the female start producing eggs? correct answersWhen she's a fetus, at 20 weeks.
They do not mature until puberty.
How much sperm is needed per mL of semen to be considered fertile? correct answers20 million
per milliliter
How long can sperm live in the female? correct answersTypically 2-3 days, but up to 8 days.
How many days does it take for the zygote to reach the uterus? correct answers3-10 days
What is the solid ball of 12-16 cells that forms after fertilization of the ovum, which undergoes
rapid division? correct answersMorula
What are the inner and out layers of the morula? correct answersInner - blastocyst - becomes the
amnion
Outer - trophoblast - becomes the chorion
If a set of twin fetuses have separate placentas, chorions and amnions and originated from
separate ova and sperm, what kind of twins are they? correct answersDizygotic
What kind of twins are a result of a random event and are not influenced by heredity or maternal
age? correct answersMonozygotic twins
What is each trimester marked by? How many weeks gestation range over each trimester?
correct answers1st-most vulnerable 0-13 weeks
2nd-major growth and development 14-28 wks
3rd- increased viablity 29-40 wks
fertilization to 14 days correct answerspreembryonic state
15 days to 8 weeks correct answersEmbryonic state
Greater than 8 weeks correct answersfetus
During which period of pregnancy do most miscarriages occur, 50% of which are due to
anomalies? correct answersEmbryonic period
Organogenesis, development of circulatory system and heart beat is first seen in what period of
pregnancy? correct answersEmbyronic
During which range of weeks gestation do teratogens pose the biggest threat against
development? correct answers15 days - 8 weeks - Embryonic period
When does the female start producing eggs? correct answersWhen she's a fetus, at 20 weeks.
They do not mature until puberty.
How much sperm is needed per mL of semen to be considered fertile? correct answers20 million
per milliliter
How long can sperm live in the female? correct answersTypically 2-3 days, but up to 8 days.
How many days does it take for the zygote to reach the uterus? correct answers3-10 days
What is the solid ball of 12-16 cells that forms after fertilization of the ovum, which undergoes
rapid division? correct answersMorula
What are the inner and out layers of the morula? correct answersInner - blastocyst - becomes the
amnion
Outer - trophoblast - becomes the chorion
If a set of twin fetuses have separate placentas, chorions and amnions and originated from
separate ova and sperm, what kind of twins are they? correct answersDizygotic
What kind of twins are a result of a random event and are not influenced by heredity or maternal
age? correct answersMonozygotic twins
What is each trimester marked by? How many weeks gestation range over each trimester?
correct answers1st-most vulnerable 0-13 weeks
2nd-major growth and development 14-28 wks
3rd- increased viablity 29-40 wks
fertilization to 14 days correct answerspreembryonic state
15 days to 8 weeks correct answersEmbryonic state
Greater than 8 weeks correct answersfetus
During which period of pregnancy do most miscarriages occur, 50% of which are due to
anomalies? correct answersEmbryonic period
Organogenesis, development of circulatory system and heart beat is first seen in what period of
pregnancy? correct answersEmbyronic
During which range of weeks gestation do teratogens pose the biggest threat against
development? correct answers15 days - 8 weeks - Embryonic period
