What does it mean when one line of the ovulation test paper is dark and the other is light?

Ovulation test strips should be familiar to most female friends. Ovulation test strips are a convenient and quick tool used to test whether a girl is pregnant. The use of ovulation test paper is also very simple. You only need to drop urine on the ovulation test paper, and the ovulation test paper will react, and generally two marks will appear. Ovulation test strips determine whether a woman is pregnant by measuring the progesterone in her body. So, what does it mean if one dark line and one light line appear on the ovulation test paper?

Normal women ovulate every month. After an egg matures in the ovary, it is released from the ovary and transported to the uterus through the fallopian tube. The pregnancy process is formed by the combination of a mature egg and sperm in the fallopian tube. Sperm can survive in the female reproductive tract for about 24-72 hours, while the suitable time for an egg to be fertilized is only about 24-36 hours after ovulation. Therefore, the 2-3 days before ovulation and 1-2 days after ovulation are the fertile period, that is, the total 4-5 days before and after ovulation are the fertile period. Ovulation test strips are used to qualitatively detect luteinizing hormone in human urine, thereby determining the time of ovulation and the "safe period" in a woman's menstrual cycle, so as to achieve the purpose of choosing the best time for conception or using the "safe period" for contraception. It is an in vitro test and auxiliary diagnosis of a woman's ovulation period. Therefore, the ovulation test strip is not used during the ovulation period, but before the ovulation period arrives.

The ultimate purpose of using ovulation test strips is to detect when ovulation occurs. If one line of the ovulation test paper is dark and the other is light, it is a weak positive. This may be because the urine is too dilute, resulting in too low LH concentration in the urine. The LH concentration in the urine lacks representativeness, so it is not advisable to drink too much water or other beverages before the test. Of course, it may also be that the test was taken too early and the LH concentration was too low. Suffering from primary hypogonadism, amenorrhea due to ovarian failure, polycystic ovary syndrome, etc. can all lead to an abnormal increase in LH; pituitary-hypothalamic lesions, amenorrhea-galactorrhea syndrome, Kallma syndrome, and anorexia nervosa. Simple pituitary LH deficiency and delayed puberty can lead to an abnormal decrease in LH, so the test results should be judged based on clinical considerations. After excluding improper operation or physical factors, if one dark line and one light line appear on the ovulation test paper, it means that ovulation is about to occur or has occurred. Mothers who are planning to become pregnant can also have sex during the weak positive period, and the chance of successful conception is not low.

Based on the above introduction, I believe everyone has a clearer understanding of what one dark line and one light line on the ovulation test paper means, and also knows how to use the ovulation test paper correctly. Generally speaking, female friends can judge whether they are pregnant based on the results of ovulation test strips, but sometimes other reasons may also cause progesterone to be high. So I finally felt more at ease going to the hospital for a diagnosis.