How Many Hours Does Your Lh Surge Last

Lisa asks…

Dark test line for one day using ovulation prediction test strips?

Hi has anyone had only one day of a dark line on their test strip i tested yesterday and had sex that afternoon and night to make sure that i catch my egg on time but what im wondering is what if i had a dark line the day before i tested as i didnt test that day.

Just need to know that i have had time and havent missed my chance

Thank you

Pregnancy Advisor’s answers:

A normal LH surge lasts around 12-36 hours so it is definitely possible to only have one day of dark lines. You don’t ovulate until after the surge and the dark line detects ovulation is about to occur so I think your timing was good. Have sex tonight as well in case you ovulate today.

Susan asks…

My ovulation tests were positive 4 days in a row –were the results correct or tests falty?

They were positive around the days I had calculated I would be ovulating, but I thought it would only show positive results for 2 days, MAYBE 3. From my research I found that ovulation last from 24 to 36 hours.

Pregnancy Advisor’s answers:

A normal ovualation lasts for up to 72 hours. I was informed this from my doctor. You body will try to ovulate during these times, but the egg lives anywhere from 12-24 hours once released. Its best to have sex starting a few days before your expected ovulation and keep going until a few days after you think you ovulated. This is to ensure you dont miss it because an ovulation detector does in fact detect the LH surge, but there is really no way to really know that you are going to release an egg, when it has released, and so on. Good luck in the baby expedition!!!

Linda asks…

My ovulation test is lighter today then yesterday. Why would that be?

Today my ovulation test wa lighter then yesterday’s one. I’m only on cycle day 11.

Why would it be lighter?

Do u think maybe my urine is more diluted?

I did have a few sips of water before testing. but had reduced my fluid intake heaps 2 hours prior to testing.
nah sandy doubt it. the tests were getting darker the last two days….
i didn’t get a positive. it didn’t get dark enough! it was only half as dark as control line.

Pregnancy Advisor’s answers:

Once you get a positive on an OPK, you stop. Don’t take it again the next day.

Test in the afternoon or after work and do not drink any liquids or go to the bathroom for at least four hours prior to testing

Read your OPK instructions carefully, as usually a faint line does not indicate a positive, you need a line that is darker than the test line

LH is produced throughout your cycle and will only predict ovulation when it has a big surge

When test is positive, have sex that night, plus two additional nights in a row

Skip one night, then do one last night of sex

Mandy asks…

Can Ovulation Predictor Tests Be Wrong?

Can they give you negatives when you think you may have ovulated ie. due to cervical mucas etc?

Pregnancy Advisor’s answers:

They can be wrong, but they are usually correct.

Some women find that they do indeed ovulate when it says, but never actually get pregnant. This is because one or both tubes are blocked.

Also, because the LH surge (which is what OPKS detect) can, in some women, last only for 12 hours, if you test once a day, you can miss it! The best thing to do is to know your body and/or chart your cycles, or start testing with OPKs twice a day, rather than just once.

Good luck!

Sharon asks…

can you still get pregnant the day after you ovulate?

me and my dh did not bd last night because i was scared it would hurt my pap smear results. It turns out i was ovulating last night though. so my question is can i bd tonight and still get pregnant?

Pregnancy Advisor’s answers:

Do you mean the day after the lh surge or the day after ovulation? The lh surge or day of a positive opk test is 24 to 36 hours before actual ovulation though some women have ovulated as early as 12 hours.
The egg lives for 24 hours. If you ovulate 36 hours from your surge then your egg is still alive for 60 hours from your LH surge so yes, some women are still fertile 48 hours from a positive opk test. That why that suggest having sex the day of your LH surge and the day after.
Since the egg dies within 24 hours (and usually decreases in it’s healthy state after 12 hours from ovulation) you can’t get pregnant after the 24 hrs from ovulation.

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