what is secreted by developing follicles?
estrogen
what is secreted by the corpus luteum?
progesterone
what stimulates the growth and
... [Show More] development of ovarian follicles?
Follicle stimulating hormone
Name the cells within the follicles that produce estrogen, which stimulates endometrial growth.
theca cells
Stimulates maturation of follicle and is responsible for Graafian follicular rupture causing ovulation.
luteinizing hormone (LH)
stimulated by FSH, dormant egg cells are surrounded by fluid-filled follicle which expands rapidly and moves to the ovarian surface
follicular phase (days 1 -14)
fetuses with Turner Syndrome may also have an association with what
cystic hygroma
what might you expect to see with spina bifida?
flattened cerebellum
how many weeks can a singleton gestational age chart can be used for twins before their growth rates slow and a multiple gestation chart should be used?
30 weeks
Cerebellar measurements can be used to estimate gestational age but lose accuracy after
30 weeks
the fetal kidneys begin to contribute significantly to the amniotic fluid by
16 weeks
the risk of complications is highest for what fetal testing
PUBS (Percutaneous umbilical blood sampling)
For best results, the optimal gestation age for Karyotyping by amniocentesis is
15 to 16 weeks
MSAFP results are reported in what units of measuments?
multiples of median (MoM)
what does DRIP stand for
demise, renal anomalies, IUGR, PROM
Acetyl cholinesterase (ACHE) is most specific for what?
spina bifida
A disorder that is caused by the presence of only one defective gene is called
autosomal dominant
sonographic visualization of a cyst fluid-filled collection adjacent and posterior to the heart most likely represents
congenital diaphragmatic hernia
the most common renal abnormality in an unborn fetus is
hydronephrosis
Hypotelorism is associated with
Cyclopia
A 1 cm thick placenta would most likely be associated with
IUGR
You are unable to identify the vascular space between placenta and myometrium. you suspect
placenta accreta
the thickness of a full term placenta should not exceed
4 cm
Epiphyseal centers will not be identified sonographically until after
30 weeks
how do you find the Cephalic Index?
BPD/OFD X 100 = CI
Sac measuments are accurate in estimating gestational age to within
2 weeks
If no embryo is seen within a sac, one can roughly calculate the gestational age in weeks by measuring the mean sac diameter and adding what to it?
-3
define quickening
sensation of fetal movement
Organogenisis is completed by
8 menstrual weeks
Physiologic herniation of fetal abdomen should not be seen after what gestational age
12 weeks
what structures can be seen routinely at the level of the bladder using a coronal view of the fetal pelvis
iliac bones [Show Less]