30 Questions
During fertilization, the mature ovum carries how many autosomes and one X chromosome?
22 autosomes and one X chromosome
How long is the ovum capable of being fertilized for?
24 hours
What is the moment called when the sperm penetrates the egg?
Fertilization
Where does fertilization typically occur?
Fallopian tubes
How long can sperm remain alive within the female genital tract?
72 hours
What is the name of the cell created when the sperm penetrates the egg?
Zygote
What determines the sex of the baby?
The number of chromosomes in the sperm
When does the ovum usually get fertilized?
Within 12-24 hours of ovulation
What is the term used to describe the period of prenatal development when the ovum is picked up by the Fallopian tubes and moved towards the ampulla?
Germinal period
What happens after penetration of the ovum by a sperm during fertilization?
The ovum becomes resistant to penetration by another sperm
During which stage does the fetus begin to produce urine?
Fetal circulation functioning
What is the purpose of the protective coating called vernix caseosa?
To protect the skin
What is the approximate weight of the fetus during the stage when lung alveoli begin to mature?
1,200 gm
What is the length of the fetus from crown to rump during the stage when the baby is gaining weight and fat layers are piling on?
35 to 37 cm
What is the purpose of the downy hair called lanugo that covers the baby?
To provide protection
What is the significance of the fetal heart being heard by electronic devices?
It indicates the beginning of fetal circulation functioning
What is the purpose of the umbilical cord in the circulatory system of the fetus?
To supply nutrients to the fetus
What is the stage when the fetus turns head-down in preparation for birth called?
Engagement
What is the purpose of the layer of fat that starts to accumulate on the baby's body?
To regulate body temperature
What is the approximate weight of the fetus during the stage when the baby's first kick is felt?
125 gm
During implantation, the blastocyst burrows deeply into the endometrium and establishes a communication network with the blood system. This process occurs approximately how many days after fertilization?
6-7 days
What is the term for the process in which the blastocyst attaches to the endometrium?
Implantation
Which hormone is responsible for maintaining the corpus luteum and causing it to continue producing progesterone in the absence of LH through the first four months of pregnancy?
HCG
At what point can implantation be detected by a home pregnancy test?
Week 3
Which layer of cells becomes the nervous system, sensory receptors, and skin in the developing embryo?
Ectoderm
At what stage of development do all organ systems exist in at least a rudimentary form?
Embryonic period
What is the function of the placenta?
Fetal respiration, transport, and nutrient function
Which side of the placenta is shiny and smooth in appearance and is where the amniotic sac is attached?
Fetal side
What is the purpose of the amniotic fluid?
To allow room for fetal movement and growth
At what length is the umbilical cord typically at full term?
30-50 cm
Test your knowledge on the milestones and stages of fetal growth and development with this informative quiz. Learn about the different periods of prenatal development and the stages of fetal development. Identify key milestones and understand the process of sex determination. Perfect for anyone interested in understanding the journey of a developing fetus.
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