The phrase "as pregnancy progresses" is correct and usable in written English.
It can be used to describe changes or developments that occur during the course of a pregnancy.
Example: "As pregnancy progresses, many women experience various physical and emotional changes."
Alternatives: "as pregnancy advances" or "as pregnancy unfolds".
Most of these symptoms subside as pregnancy progresses.
Conclusions: Certain substrate and hormonal responses to exercise are altered as pregnancy progresses.
As pregnancy progresses, the uterus rises out of the pelvis and fills the abdominal cavity.
The iodine crosses the placenta and reaches the fetus, and the fetal thyroid takes up more iodine as pregnancy progresses.
As pregnancy progresses, placental production of progesterone increases, and these high doses suppress ovulation, preventing a second conception.
As pregnancy progresses, the fetal blood vessels become larger, the connective tissue stretches over them, and the syncytiotrophoblastic layer becomes fragmentary.
As pregnancy progresses, each ureter becomes larger, so that it lies in multiple broad curves rather than forming an almost straight line downward from the kidney.
The researchers studied genes linked to the placenta, the maternal immune system and the fetal liver, and found nine of those genes produce RNA signals that change distinctly as pregnancy progresses.
During this time the male nurtures the developing young by regulating the chemistry of the fluid inside the pouch, slowly transforming it from that of his internal body fluids to that of salt water as pregnancy progresses.
As pregnancy progresses, the stomach is pushed upward; near term it lies like a flabby pouch across the top of the uterus instead of hanging downward, as it normally does, in a semivertical position.
As pregnancy progresses the breasts become larger, the lightly pigmented area (areola) around each nipple becomes first florid or dusky in colour and then appreciably darker; during the later months the areola takes on a hue that is deep bronze or brownish black, depending on the woman's natural pigmentation.
