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A median of 288 days (274 days from the date of ovulation) for first-time mothers and 283 days (269 days from the date of ovulation) for mothers with at least one previous pregnancy was found by a 1990 study of 114 white, private-care patients with uncomplicated pregnancies and spontaneous labor. The authors suggest that excluding pregnancies ...
Nicolaides has developed methods of (i) screening for premature birth (which is the main cause of perinatal morbidity and mortality) by measurement of cervical length and prevention through the use of vaginal progesterone, [9] (ii) screening for pre-eclampsia (which is one of the main causes of maternal mortality) by measurement of blood flow ...
Eclampsia, like pre-eclampsia, tends to occur more commonly in first pregnancies than subsequent pregnancies. [38] [39] [40] Women who have long term high blood pressure before becoming pregnant have a greater risk of pre-eclampsia. [38] [39] Patients who have gestational hypertension and pre-eclampsia have an increased risk of eclampsia. [41]
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Pre-eclampsia affects 2–8% of pregnancies worldwide. [4] [17] [12] Hypertensive disorders of pregnancy (which include pre-eclampsia) are one of the most common causes of death due to pregnancy. [6] They resulted in 46,900 deaths in 2015. [7] Pre-eclampsia usually occurs after 32 weeks; however, if it occurs earlier it is associated with worse ...
Poon was the first researcher to have developed an effective first trimester prediction model based on a combination of maternal factors, blood pressure, uterine artery Doppler, serum pregnancy-associated plasma protein-A and placental growth factor for early-onset preeclampsia, achieving a detection rate of 90%, at 5% false-positive rate.
For example, if there is a gestational age based on the beginning of the last menstrual period of 9.0 weeks, and a first-trimester obstetric ultrasonography gives an estimated gestational age of 10.0 weeks (with a 2 SD variability of ±8% of the estimate, thereby giving a variability of ±0.8 weeks), the difference of 1.0 weeks between the ...
[1] [2] [3] Common complications of pregnancy include anemia, gestational diabetes, infections, gestational hypertension and pre-eclampsia. [4] [5] Presence of these types of complications can have implications on monitoring lab work, imaging, and medical management during pregnancy. [4]
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