When To Take A Pregnancy Test While Breastfeeding When To Do Pregnancy Test While Breastfeeding

Summary: If you’re trying to conceive while breastfeeding, it can be confusing when to take a pregnancy test. Breastfeeding may affect ovulation, and therefore, your menstrual cycle, leading to irregular periods. This article aims to guide you on when to take a pregnancy test while breastfeeding, taking into account the timing of your period, the hormones involved in ovulation, and the sensitivity of your pregnancy test.

1. Understanding Breastfeeding and Ovulation

While breastfeeding, the hormone that stimulates milk production, called prolactin, also suppresses the hormone that triggers ovulation, called luteinizing hormone (LH). This usually results in suppressed ovulation and, therefore, inhibited fertility. However, the degree of suppression differs across individuals, and some women may experience ovulation while breastfeeding, even without having resumed their periods.

To determine whether or not you’re ovulating while breastfeeding, it’s recommended to track your cervical mucus, which changes in consistency as your hormone levels fluctuate. When your cervical mucus becomes thin and stretchy, it’s a sign that ovulation is imminent or has occurred. Additionally, tracking your basal body temperature, which typically rises after ovulation, can confirm whether or not ovulation has taken place.

However, even if you’re not ovulating, it’s possible to get pregnant while breastfeeding. This is because LH levels can surge unexpectedly, leading to ovulation, and sperm can survive in the female reproductive tract for up to five days. Therefore, if you’re not actively preventing pregnancy, it’s essential to be mindful when engaging in sexual activity and use contraception accordingly.

2. Timing Your Pregnancy Test

If you’re trying to conceive while breastfeeding, it’s best to wait until you miss your period before taking a pregnancy test. As mentioned earlier, breastfeeding can affect your menstrual cycle, leading to irregular periods. Therefore, the timing of your pregnancy test should be based on when you expect your next period and not the duration since sexual intercourse.

However, if you’re unsure of when your period is due, you can use an ovulation prediction kit (OPK) to monitor the level of LH in your urine. OPKs work similarly to pregnancy tests in that they detect hormones, only that they measure LH instead of human chorionic gonadotropin (hCG), the hormone produced in early pregnancy. When your LH levels surge, it’s a sign that you’ll ovulate within 24 to 36 hours and should time intercourse accordingly.

If you’ve missed your period and suspect that you may be pregnant, you can take a home pregnancy test. However, keep in mind that breastfeeding can lower hCG levels in the early stages of pregnancy, making it harder to detect with a home pregnancy test. Therefore, it’s recommended to use a more sensitive pregnancy test and to test first thing in the morning when hCG levels may be highest.

3. Sensitivity of Pregnancy Tests

Pregnancy tests are designed to detect hCG in the urine, with some tests being more sensitive than others. The sensitivity of a pregnancy test typically refers to the amount of hCG it can detect, measured in milli-International Units per milliliter (mIU/ml). A lower value indicates a more sensitive test, meaning it can detect lower levels of hCG and, therefore, detect pregnancy earlier.

While most home pregnancy tests have a sensitivity of 25 mIU/ml, some tests can detect hCG levels as low as 10 mIU/ml. If you’re testing early or suspect that your hCG levels may be lower than usual due to breastfeeding, it’s recommended to use a more sensitive test for better accuracy.

Additionally, certain medications, such as fertility drugs that contain hCG, can cause false positives in pregnancy tests. Therefore, it’s essential to read the instructions of the test carefully and seek medical advice if you’re uncertain of the results.

4. False Alarms and Misconceptions

While it’s possible to get pregnant while breastfeeding, it’s also common for women to experience irregular periods or period-like symptoms while breastfeeding, leading to false alarms. Breastfeeding can cause fluctuations in hormones, leading to symptoms such as cramping, spotting, or mood swings, which may be mistaken for early pregnancy symptoms.

Furthermore, some women may experience lactational amenorrhea, where menstruation is temporarily inhibited due to breastfeeding. However, it’s essential to keep in mind that this method of contraception is not foolproof and that ovulation can still occur unexpectedly. Therefore, it’s recommended to use contraceptives if you’re not actively trying to conceive.

Lastly, it’s important to seek medical advice from a healthcare provider concerning fertility and pregnancy while breastfeeding. Your healthcare provider can offer personalized advice based on your health history and current breastfeeding practices and guide you on the best course of action for your situation.


In conclusion, determining when to take a pregnancy test while breastfeeding depends on several factors, including the timing of your period, hormones involved in ovulation, and sensitivity of the pregnancy test. While breastfeeding can inhibit ovulation, it’s still possible to get pregnant, and it’s essential to use contraceptives unless you’re actively trying to conceive. Seek medical advice if you have any concerns about fertility or pregnancy while breastfeeding and remember to track your menstrual cycle and symptoms to make informed decisions.

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