Rarr-A in pregnancy - the norm

Opinions about the informativeness of prenatal screenings diverge. Some believe that this is another reason to worry. Others are convinced that analysis can serve as the first signal about a real threat. However, it is better to be safe, especially in those matters that concern the health of the future baby. In particular, the analysis of the Rarr-A pregnancy (Russian-language version of Papp-A), which is conducted during the first prenatal screening , will help clarify the picture.

The analysis of Rarr-A (Papp-A) in pregnancy - what is the essence?

A characteristic marker of the risk of childbearing with some problems at the gene level is the level of Rarr-A in pregnancy, or more accurately - its compliance with the norm. If you literally decipher and translate from English this abbreviation, then Rarr-A is nothing more than a pregnancy-associated protein A-plasma, the concentration of which increases in proportion to the time.

Doctors recommend to undergo examination from 8 to 14 weeks of pregnancy. But, since the RARR-A is determined in conjunction with HCG, the optimal time to take the RARR-A test for pregnancy is the interval from 11 to 13 weeks. At this stage, the results will be as informative as possible.

Because Rapp-A can indicate chromosomal abnormalities of the fetus, a double test is strongly recommended to pass through to women:

If Rarr-A during pregnancy does not meet the norm, the doctor will prescribe an additional examination in order to make sure that everything is fine with the baby.

The unit of measure is RARR-A-mU / mL, and the limits of the norm depend on the gestational age, thus:

Reduced and elevated RARP-A (Papp-A) in pregnancy

If the analysis on Rarr-A (Papp-A) during pregnancy has a low content of this protein in the mother's body, this may indicate the probability of having some chromosomal abnormalities. Also, an understated value may indicate a threat of miscarriage or a frozen pregnancy.

If the Rahr-A during pregnancy is raised, then most likely, there was an error in determining the duration of pregnancy. Therefore, experts recommend, before doing a screening, first to undergo ultrasound, in order to determine the exact period of gestation. At the same time, the increased value does not exclude the possibility of pathological abnormalities.