Pregnant women tests discover dating
Some pregnancy tests are more sensitive than others.The more sensitive tests may be able to detect low levels of h CG as early as four days before your period is due, which is usually about seven days after you’ve conceived.[Related: Early Signs of Pregnancy] An earlier diagnosis can also provide health professionals with the opportunity to advise women about their pregnancy options and to discuss avoiding potentially harmful habits that can affect the developing fetus, such as smoking, drinking alcohol and using illegal drugs.Previously, pregnancy tests were done by doctors and nurses, and they were more complicated.Gestational age (GA) refers to the length of pregnancy after the first day of the last menstrual period (LMP) and is usually expressed in weeks and days. Conceptional age (CA) is the true fetal age and refers to the length of pregnancy from the time of conception.This terminology does vary geographically and over time, and it may need clarification if not explicitly defined in relevant articles.The test consisted of purified water, a test tube containing sheep red blood cells and a medicine dropper.
In general, pregnancy tests range in sensitivity from 10m IU/ml to 40 ml U/ml.
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 basic methods used to help estimate gestational age (GA) are menstrual history, clinical examination, and ultrasonography.
The date of the first documented positive pregnancy test and the beta-human chorionic gonadotropin (b HCG) level may help ascertain the minimum gestational age.
In women who conceived following assisted reproduction techniques, the date of embryo transfer is known and may date the pregnancy accurately.
In rare cases, the date of coitus is known, and this may be useful in calculating the length of pregnancy.