Local Changes in Pregnancy Flashcards
Length, Depth, Width, Weight change of Uterus.
Length grows from approx. 6.5 to 32 cm.
Depth increases from 2.5 to 22 cm.
Width expands from 4 to 24 cm
Weight increases from 50 to 1,000 grams.
The house of a full term baby
Uterus
Thickness of uterine wall in early pregnancy
1cm to 2cm
Thickness of uterine wall in end of pregnancy
0.5cm
Hormone that causes the formation of new muscle fibers in the uterine
myometrium.
Progesterone
Hormone that causes the stretching of existing muscle fibers
Estrogen
It allows the uterus to withstand the
stretching of its muscle fibers
Fibroelastic tissue
What hormone causes growth of uterus in pregnancy?
Estrogen and Progesterone
Part of the uterus that is responsible for contractions
Myometrium
How progesterone regulates muscle contraction?
By maintaining a decreased level of vascular tone in the myometrium
If the vascular tone is increase in myometrium, there
is also an increased in contractility
Hormone that regulates muscle contraction
Progesterone
When does the stretching of existing muscle fibers happen?
5 months gestation
Height of fundus in 12th week
above symphysis pubis
Height of fundus on 20th or 22nd week
Level of umbilicus
Height of fundus on 36th week
Xiphoid process
What happens on the 38th week?
Lightening
Volume of uterus increase
2 ml to more than 1,000 ml
What is Hegar’s Sign
Extreme softening of the lower uterine segments
“To toss about”
Ballottement
When should ballottement be demonstrated by a bimanual examination?
16 to 20 weeks
False labor
Braxton Hicks Contractions
It increases placental perfusion
Braxton Hicks Contractions
Hormone that causes cervix to be edematous and vascular
Estrogen
The mucus plug in the cervical
canal
Operculum
