To be clear, ovulation tests are intended to be used to predict ovulation and help you time intercourse around peak fertility to allow for the best possible chance at conception.
However, you may have heard about some women using their ovulation tests as a pregnancy test. While ovulation tests are meant to predict ovulation, some women claim they use ovulation tests as pregnancy tests.
As we mentioned, ovulation tests measure LH in urine. Pregnancy tests, on the other hand measure human chorionic gonadotropin hCG hormone levels in urine. It helps maintain the production of other vital hormones during pregnancy, such as estrogen and progesterone.
It just so happens that LH and hCG are both glycoproteins, or proteins that are built with a sugar attached to them. As we know, the functions of these two hormones are vastly different: LH stimulates ovulation, while hCG helps maintain pregnancy. However, their structures are super similar! While LH and hCG have different functions in the body, their structures are very similar. So similar, in fact, that some ovulation tests cannot tell the difference between LH and hCG in urine!
It can take about 6 to 10 days for a fertilized egg to successfully implant. After ovulation, LH levels decrease sharply. LH levels do not look the same across all people and all cycles. Every woman is different and research shows that there may actually be many different LH surge patterns. Healthy LH levels fluctuate throughout both the life cycle and throughout the menstrual cycle.
Although the hormone spikes to kick start ovulation, LH levels do not remain high during pregnancy. Some conditions can make detecting ovulation or an LH surge difficult.
These two tests measure very different things and cannot be used interchangeably. You run the risk of inaccurate or false results when the tests are used for something other than what they were intended. Even though both tests measure hormones, their usefulness lies in how those hormones are measured and what the test is trying to detect. In other words, they tell us different things at different times. Ovulation tests are not meant to detect the hormone present during pregnancy hCG and are only meant to detect LH levels over a certain threshold.
Pregnancy testing after ovulation should be done with a pregnancy test rather than an ovulation test for the most accurate results. If you think you might be pregnant, the most accurate way to confirm is through a blood test or an early detection pregnancy test. It might be tempting to use an ovulation test strip, especially if you have extras, but they are not accurate at detecting pregnancy and you run the risk of getting a false negative.
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There are many different types of ovulation tests , but they work by the same basic mechanism: by detecting Luteinizing Hormone LH in your urine. LH levels surge about hours before ovulation—conveniently when you're most likely to get pregnant. The biggest difference between the two is that hCG has a circulating half-life that is approximately fold longer than that of LH.
Therefore, the right amount of either hormone in your urine will result in a positive OPK result. If you think you might be pregnant, the best and most accurate way to confirm is to use an early detection pregnancy test. Luteinizing hormone is something I only heard of once I started paying more attention to my menstrual cycle more closely.
I never tracked my cycle before and when I found out that ovulation only happens once per month and you literally have one chance of pregnancy each month it shocked me, not like in the movies. I started using ovulation predictor kits to detect ovulation a few months back and since then I have been keeping a close eye on LH surges. Ovulation test strips are simply strips of paper that can be bought in bulk, test strips are not overly expensive, you can buy digital ovulation tests but these are more expensive.
Sometimes, we can end up spending a fortune on home pregnancy tests searching for two lines in the window and a positive result, the trouble is for many of us the two-week wait is just too much to bear and the waiting, symptom spotting and daydreams about cuddling our bundle of joy that we simply cannot wait to take a pregnancy test.
It is almost like the pregnancy tests call to us from the local Tesco around the corner…. Ok, so here you are, your at the point where you need to test and you may not have any pregnancy tests in the cupboard and perhaps you just NEED to know if you are or not.
You have ovulation sticks so can you use ovulation tests for pregnancy? Although ovulation strips are detecting for an LH surge not for HCG the pregnancy hormone they can sometimes bring up a faint line to show pregnancy, please note we do not recommend this because you could be having a LH surge when you check and you may see two lines in the window which will get your hopes up, we do recommend using a pregnancy test instead of a ovulation test even though an ovulation test can potentially detect early pregnancy.
Ovulation tests are designed to be used as ovulation tests and nothing else.
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