Dr pls if am not sure about my last period if 24/4 =24/5(so can eko know that)fe y7dd eza ana 23 weeks or 27weeks..cuz 80% my period in 24/4/2014.what i have to do?
The estimation of pregnancy dates is important for the mother, who wants to know when to expect the birth of her baby, and for her health care providers, so they may choose the times at which to perform various screening tests and assessments, such as serum screening, assessment of maturity, and induction of labor for postdate pregnancies.
The 3 main methods used to help estimate gestational age (GA) are menstrual history, clinical examination, and ultrasonography. The first 2 are subject to considerable error and should only be used when ultrasonography facilities are not available.
Menstrual history
Gestational age (GA) has traditionally been estimated from the date of the last menstrual period (LMP). This estimation assumes that conception occurs on day 14 of the cycle. The flaw in this assumption is that the time of ovulation varies greatly in relation to the menstrual cycle, both from cycle to cycle and among different women. It is also not uncommon for pregnant women to be uncertain about the date of their LMP, with 10-45% of pregnant women unable to provide useful information about their LMP, and 18% of women with certain menstrual dates have significant differences between menstrual and ultrasonographic dating.
Date of pregnancy test
Knowing the date of the first positive pregnancy test result allows the calculation of a minimum GA. This depends on the sensitivity of the test.
Clinical examination
The size of the uterus can be assessed by pelvic examination or by abdominal palpation. Size can be misleading in the presence of multiple pregnancy, uterine fibroids, or a full bladder. Tape measurement of the symphysis-fundus height (from the lowest point in the mid abdomen up to the navel) may be useful up to 28-30 weeks' gestation, beyond which it becomes too inaccurate for dating.
Ultrasound
By far the most accurate technique for estimating gestational age (GA).
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