Week 1 Lecture Review Flashcards
Clinically oriented embryology
Bridges the gap between prenatal development and obstetrics, perinatal medicine, pediatrics, and clinical anatomy; Develops knowledge concerning the beginnings of life and the changes occurring during prenatal development; Builds an understanding of the causes of variations in human structure; Illuminates clinically oriented anatomy and explains how normal and abnormal relations develop
Most visible changes occur during what period of development?
3 - 8 weeks
In what year was the first test tube baby born?
1978
How long does the entire process of spermatogenesis take?
2 months
What is the rate of early spontaneous abortion?
45%
Which teratogen caused severe limb anomalies in the 1960s?
thalidomide
Which teratogen was documented as the first time that concrete evidence was presented that
showed that a developing fetus could be adversely affected by an environmental factor (1941)?
rubella
This disorder that is commonly screened for via genetic carrier screening can also play a role in
male infertility as it can cause congenital absence of the vas deferens.
Cystic fibrosis
T/F: Birth defects cause most deaths during infancy.
True
This week of gestation marks the beginning of the fetal period.
9th
T/F: During the embryonic period, differentiation and growth of tissues and organs occur and the rate of
body growth increases.
False
T/F: Understanding causative relationships between embryology and development is essential for
educating parents and families with regards to etiology and especially to dispel parental feelings of guilt
regarding birth defects.
True
T/F: At week 10 genitalia have male/female characteristics and are fully formed.
False
T/F: The timing of events during meiosis is the same between the 2 sexes.
False
T/F: The second meiotic division is similar to mitosis except that the cells are haploid.
True
T/F: Nondisjunction [mostly] occurs at the 1st meiotic division.
True
T/F: Some oogonia develop into primary oocytes before birth and some develop after birth.
False
T/F: The division of cytoplasm is equal in spermiogenesis and oogenesis.
False
T/F: The presence of a corpus luteum cyst on an early ultrasound is a finding that should concern a
clinician and is related to adverse outcome.
False
T/F: Freshly ejaculated sperms are able to fertilize an oocyte.
False
T/F: Although fertilization can occur in other parts of the uterine tube (normally happens in the ampulla),
it does not occur in the body of the uterus.
True
T/F: The synctiotrophoblast has definite cell boundaries and is mitotically active.
False
T/F: There is enough detectable hCG by the end of the 2nd week of pregnancy to give rise to a positive
pregnancy test.
True
T/F: Growth of the bilaminar disc is slow in comparison to the trophoblast.
True
T/F: At 14 days the embryonic disc is still flat and structures that will organize the fetal head are already
present.
True
Women who suffer from anovulation may take a simple hormonal stimulator which may result in several
ovarian follicles and multiple ovulations. The common name of this drug is
clomid
There are sperm(s) that result from one primary spermatocyte.
4
There are oocyte(s) that result from maturation of primary oocyte.
1
The _____ is another term for “yolk sac”, which actually contains no yolk in humans.
umbilical vesicle
More than ___% of all known spontaneous abortions result from chromosomal abnormalities
50
