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Option 2 : Fetal heart rate detected by a non-electric device
Concept:
- A fetal heartbeat usually first be detected by a vaginal ultrasound as early as 5 to 6 weeks after gestation
- That is when a fetal pole, the first visible sign of a developing embryo, can sometimes be seen. So the fetal development is not the probable sign of pregnancy.
- It usually comes under Positive signs of pregnancy are those signs that are definitely confirmed as a pregnancy. It include
- Fetal heart sounds
- Ultrasound scanning of the fetus
- Palpation of the entire fetus
- Palpation of fetal movements, x-ray
- Actual delivery of an infant
- Probable signs of pregnancy basically are considered to be signs that the examiner can observe.
- Jacquemier's sign -> is a purplish discoloration of the mucous membrane of the vagina that occurs early in pregnancy.
- Chadwick's sign -> is also an early sign of pregnancy. It occurs when blood flow to the cervix and vagina increases around the fourth week of pregnancy, causing those tissues to become purplish-red.
- Uterine contractions -> are muscle contractions of the uterine smooth muscle that occur during the menstrual cycle. Uterine contractions occur throughout the menstrual cycle in the non-pregnant state and throughout gestation as well.
- Braxton-Hicks contractions -> are also known as prodromal = False labor pains, are contractions of the uterus that typically are not felt until the second or third trimester of the pregnancy. Braxton-Hicks contractions are the body's way of preparing for true and actual labor, but they do not indicate that labor has begun.
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