25 Questions
What is the term used to describe a pregnancy where the uterus contains more than one baby?
Multiple gestation
What is the term for babies in the uterus?
Fetuses
How many fetuses are present in a multiple pregnancy?
More than one
What is the alternative spelling of the term 'fetus'?
Foetus
What is the unit of measurement for the number of fetuses in a multiple pregnancy?
M
What is the percentage of twin gestation that occurs due to monozygotic twining?
20%
What is the term used to describe monozygotic twins?
Uni-ovular twins
What is the result of one ovum being fertilized by one spermatozoon in monozygotic twining?
One embryo that splits into two
What is the characteristic of monozygotic twins in terms of their sex?
They are always the same sex
What is the term used to describe the fertilization of one ovum by one spermatozoon?
Monozygotic fertilization
What is the primary characteristic that distinguishes Dizygotic twin gestation from Monozygotic twin gestation?
Fertilization of two separate eggs
Which type of twin gestation is more likely to result in identical twins?
Monozygotic twin gestation
What is the primary reason why Dizygotic twins are more common than Monozygotic twins?
The fertilization of two separate eggs is more likely to occur naturally
What is the difference in the number of placentas and amniotic sacs between Dizygotic and Monozygotic twins?
Dizygotic twins have two placentas and two amniotic sacs, while Monozygotic twins have one placenta and one amniotic sac
What is the biological explanation for why Dizygotic twins are more likely to be fraternal?
Dizygotic twins are formed from two separate eggs, resulting in different genetic makeup
What is the primary factor that determines the type of placentation in monozygotic twining?
The timing of zygote division after fertilization
Which type of placentation is characterized by a single chorion and a single amnion?
Monochorionic and monoamniotic (MCMA)
What is the difference between monochorionic and diamniotic (MCDA) and monochorionic and monoamniotic (MCMA) placentation?
The number of amnions
Which type of placentation is characterized by two separate chorions and two separate amnions?
Dichorionic and diamniotic (DCDA)
What is the relationship between the timing of zygote division and the type of placentation in monozygotic twining?
Later division leads to MCMA placentation
What is the type of placentation when the division of the zygote occurs within three days after fertilization?
Dichorionic diamniotic
At what stage of development do conjoined twins most likely form?
After 13 days after fertilization
What is the type of placentation when the division of the zygote occurs between 8 and 13 days after fertilization?
Monochorionic and monoamniotic
Between what days after fertilization does the division of the zygote result in monochorionic and diamniotic twins?
Between 3 and 8 days
What is the type of placentation when the division of the zygote occurs between 3 and 8 days after fertilization?
Monochorionic and diamniotic
Test your knowledge about multiple pregnancy, a condition where a woman carries more than one fetus simultaneously. Learn about the definition, causes, and complications of multiple pregnancy. This quiz is perfect for medical students and professionals.
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