Identifying and Dating a Pregnancy

A woman who usually has regular menstrual periods may be pregnant if a menstrual period is a week or more. Occasionally a woman may presume she is pregnant for the reason that she has characteristic symptoms. They include the next:
• Enlarged and tender breasts
• Nausea with occasional vomiting
• A need to urinate frequently
• Unusual fatigue
• Changes in appetiteA woman may utilize a home pregnancy test to find out whether she is pregnant when a menstrual period is late. Home pregnancy tests identify human chorionic gonadotropin (HCG) in urine. Human chorionic gonadotropin is a hormone manufactured by the placenta. Results of home pregnancy tests are correct about 97% of the time. If results are negative however the woman still suspects she is pregnant, she should do again the home pregnancy test a few days later. The first test may have been done too early (previous to the next menstrual period is supposed to start). If results are positive, the woman should get in touch with her doctor, who may do another pregnancy test to prove the results.

To determine whether the woman is pregnant physicians test a sample of blood or urine. These tests are more than 99% truthful. One of these tests, called an enzyme-linked immunosorbent assay (ELISA), can rapidly and easily detect even a low level of human chorionic gonadotropin in urine. Some tests can detect the very low level that is present several days following fertilization (earlier than a menstrual period is missed). Results may be accessible in about half an hour. For the duration of the first 60 days of a normal pregnancy with one fetus, the level of human chorionic gonadotropin in the blood approximately doubles about every 2 days. These levels can be measured throughout the pregnancy to find out whether the pregnancy is progressing normally.

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