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Concept
Gestational hypertension
Summary
Gestational hypertension or pregnancy-induced hypertension (PIH) is the development of new hypertension in a pregnant woman after 20 weeks' gestation without the presence of protein in the urine or other signs of pre-eclampsia. Gestational hypertension is defined as having a blood pressure
greater than 140/90 on two occasions at least 6 hours apart.
No single diagnostic test currently exists to predict the likelihood of developing gestational hypertension. High blood pressure is the major sign in diagnosing gestational hypertension. Some women with gestational hypertension may present asymptomatic, but a number of symptoms are associated with the condition.
Symptoms
Edema
Sudden weight gain
Blurred vision or sensitivity to light
Nausea and vomiting
Persistent headaches
Increased blood pressure
Maternal causes
Obesity
Mothers under 20 or over 40 years old
Past history of diabetes mellitus, hypertension (particularly gestational hypertension) and renal disease
Pre-existing hypertension
Thrombophilias (anti-phospholipid syndrome, protein C/S deficiency, factor V Leiden)
Having donated a kidney
Pregnancy
Multiple gestation (twins or triplets, etc.)
Placental abnormalities:
Hyperplacentosis: Excessive exposure to chorionic villi
Placental ischemia
Family history
Family history of pre-eclampsia
There exist several hypertensive states of pregnancy:
Gestational hypertension
Gestational hypertension is usually defined as having a blood pressure higher than 140/90 measured on two separate occasions, more than 6 hours apart, without the presence of protein in the urine and diagnosed after 20 weeks of gestation.
Pre-eclampsia
Pre-eclampsia is gestational hypertension plus proteinuria (>300 mg of protein in a 24-hour urine sample). Severe pre-eclampsia involves a blood pressure greater than 160/110, with additional medical signs and symptoms. HELLP syndrome is a type of pre-eclampsia. It is a combination of three medical conditions: hemolytic anemia, elevated liver enzymes and low platelet count.
Official source
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Pregnancy
Pregnancy is the time during which one or more offspring develops (gestates) inside a woman's uterus (womb). A multiple pregnancy involves more than one offspring, such as with twins. Pregnancy usually occurs by sexual intercourse, but can also occur through assisted reproductive technology procedures. A pregnancy may end in a live birth, a miscarriage, an induced abortion, or a stillbirth. Childbirth typically occurs around 40 weeks from the start of the last menstrual period (LMP), a span known as the gestational age.
HELLP syndrome
HELLP syndrome is a complication of pregnancy; the acronym stands for hemolysis, elevated liver enzymes, and low platelet count. It usually begins during the last three months of pregnancy or shortly after childbirth. Symptoms may include feeling tired, retaining fluid, headache, nausea, upper right abdominal pain, blurry vision, nosebleeds, and seizures. Complications may include disseminated intravascular coagulation, placental abruption, and kidney failure. The cause is unknown.
Placental abruption
Placental abruption is when the placenta separates early from the uterus, in other words separates before childbirth. It occurs most commonly around 25 weeks of pregnancy. Symptoms may include vaginal bleeding, lower abdominal pain, and dangerously low blood pressure. Complications for the mother can include disseminated intravascular coagulopathy and kidney failure. Complications for the baby can include fetal distress, low birthweight, preterm delivery, and stillbirth. The cause of placental abruption is not entirely clear.