MATERNAL PHYSIO 1 Flashcards
Uterus of a non-pregnant woman
70g and almost solid, except for the cavity of 10ml or less
Uterus during pregnancy
- Weights 1,100g
- Thin-walled muscular organ of sufficient capacity to accommodate the fetus, placenta and amniotic fluid
Uterus during pregnancy is stimulated by
Estrogen and Progesterone
3 Layers of the myocyte arrangement
- Outer hood-like layer
- Middle layer
- Internal layer
Arches over the fundus and extends into the various ligament
Outer hood-like layer
Composed of 2 dense network of muscle fibers
perforated in all directions by blood vessels
Middle layer
With sphincter-like fibers around the fallopian tube orifices
and internal cervical os
Internal layer
Uterine shape and position during 1st few weeks
maintain original piriform or pear shape
Uterine shape and position during 12 week AOG
corpus and fundus become globular and
almost spherical, the organ grows rapidly in length than in width
and becomes ovoid
Uterine shape and position during End of 12 weeks AOG
enlarged uterus extends out of the pelvis, it contacts the anterior abdominal wall, displaces the intestines
laterally and superiorly and ultimately reaches almost to the liver
Uterine ascent
rotates to the right, this dextrorotation likely is
caused by the rectosigmoid on the left side of the pelvis
The uterus rises, tension is excreted on
broad and round
ligament
the longitudinal axis of the uterus corresponds
to an extension of the pelvic inlet axis, when relax the abdominal
wall supports the uterus and maintain its axis
Standing position
the uterus falls back to rest on the vertebral
column and the adjacent great vessels
Supine position
Uterine contractility during Early pregnancy
- Irregular contractions
- Painless
