Negative Lh Surge And Pregnancy

Donna asks…

Do you think Ovulation tests actually work?

According to the test, i was ovulating on day 15/16 however my temperature did not rise but i had cramps and pain. We had intercourse on days 14, 15, 16 & 17. I am due for a period today 6/2/09 and did i pregnancy test but it showed up negative. Did we have intercourse at the right time? Did i do a PG test too early????
i have about a 31 day cycle.

Pregnancy Advisor’s answers:

They measure a hormone (LH) that your body releases and that hormone tells the mature follicle to release an egg. It is possible to get an LH surge but not ovulate that cycle. That is why they are called ovulation PREDICTOR kits… They predict when ovulation is about to take place but they have no way of telling you whether or not you actually ovulated. Sometimes a woman’s body gets screwy and occasionally skips ovulating a month.

Linda asks…

I have been testing when i am supposed to ovulate but its always negative.?

I have been testing for the past week using ovulation test but they are all negative. I should have ovulated sometime this past week. Has this ever happened or anyone have any words on this? We have still be been having sex every other day and will continue to. But do you think I could have ovulated if the tests all came back negative.

Pregnancy Advisor’s answers:

Okay, 2 things… 1) You started testing too early, and now you need to keep going until you get it or 2) You tested too late and missed it for this cycle. And actually a third option…you are ovulating later than usual this month. This actually happened to me recently… I ovulated on Day 27!

Some doctors say ovulation kits are useless, others recommend them… So who knows.

I will say this though… It’s possible you ovulated and missed your surge if you tested too early. Unlike pregnancy tests that recommend first morning urine, ovulation tests actually work best with late in the day urine. The reason for this is because most women have an LH surge early in the morning and it takes about 4 hours after that for it to be detected. So, if you test during that 4-hour window, you will get a false negative and testing the next day may be too late. It’s like trying to catch a meteor shower, LOL.

Were you testing in the morning? Afternoon? Evening? Was it the SAME time every day? These are actually more critical questions than with pregnancy tests.

You basically have 2 choices…. You can buy another kit and keep testing, or you can just keep having sex as you are doing until your period comes (or doesn’t come).

Good luck, and feel free to email me if you have questions about my response. Take care.

Betty asks…

How do birth control pills work?… i will vote best answer for 10 pts.?

specifically, 1. how do they stop ovulation & 2. how do the 7 pills at the end of the pack let you have a period? I’m talking about loestrin 24 fe, 28 day cycle.

Please include links to your sources.

Pregnancy Advisor’s answers:

They work by changing normal hormore patterns that are required to enable ovulation. The very first ones replicated hormonal conditions that exist during pregnancy to suppress ovulation.

From wikipedia:
Combined oral contraceptive pills were developed to prevent ovulation by progestogenic and estrogenic suppression of gonadotropin release. Combined hormonal contraceptives, including COCPs, inhibit follicular development and prevent ovulation as their primary mechanism of action.[2][20][58][59][60]

Progestagen negative feedback decreases the pulse frequency of gonadotropin-releasing hormone (GnRH) release by the hypothalamus, which decreases the release of follicle-stimulating hormone (FSH) and greatly decreases the release of luteinizing hormone (LH) by the anterior pituitary. Decreased levels of FSH inhibit follicular development, preventing an increase in estradiol levels. Progestagen negative feedback and the lack of estrogen positive feedback on LH release prevent a mid-cycle LH surge. Inhibition of follicular development and the absence of a LH surge prevent ovulation.[2][20][58]

Estrogen was originally included in oral contraceptives for better cycle control (to stabilize the endometrium and thereby reduce the incidence of breakthrough bleeding), but was also found to inhibit follicular development and help prevent ovulation. Estrogen negative feedback on the anterior pituitary greatly decreases the release of FSH, which inhibits follicular development and helps prevent ovulation.[2][20][58]

A secondary mechanism of action of all progestagen-containing contraceptives is inhibition of sperm penetration through the cervix into the upper genital tract (uterus and fallopian tubes) by decreasing the amount of and increasing the viscosity of the cervical mucus.[60]

Other secondary mechanisms have been hypothesized. One example is endometrial effects that prevent implantation of an embryo in the uterus. Pro-life groups consider such a mechanism to be abortifacient, and the existence of postfertilization mechanisms is a controversial topic. Some scientists point out that the possibility of fertilization during COCP use is very small. From this, they conclude that endometrial changes are unlikely to play an important role, if any, in the observed effectiveness of COCPs.[60] Others make more complex arguments against the existence of these mechanisms.[61] And some scientists argue the existing data supports such mechanisms.[62] The controversy is currently unresolved.

Sandy asks…

Is it possible to get pregnant while you have the HCG hormone in you from previous miscarriage?

Pregnancy Advisor’s answers:

Sorry to say but HcG blocks FSH and LH hormones otherwise we would be ovulating during pregnancy.
Hcg does increase fertility though. The cervix and uterus have what are called memory cells. They are the reason why women conceive easily during the 1st 3 months after a miscarriage and the reason why our labor/childbirths are faster/easier with each child we have.
Hcg injections stay in your body. I had a surgery scheduled and had the post op done 16 days post my hcg shot and I got a negative hpt test (15 days post injection) but the blood test showed positive. I had to go take a quant. Beta to show it was the hcg not a pregnancy. AF started that morning so I knew it was either the injection or a chem pregnancy. My first beta was 52 yet hpt was a big fat negative. The next day beta dropped to 45. Even though I was having af, I still had hcg in your system. I did even up having anther af 5 days after 1st one–I think my body realized the hormones weren’t in sync so it started af again to restart to day 1.
Hormones work on a feedback system. FSH grows the eggs. The growing eggs make estrogen which builds the lining. By day 9, one growing egg becomes the dominate “chosen one to ovulate”. The other’s small ones continue supporting it by making more estrogen which makes more fsh. When the dominating egg reaches a certain size, the body surges LH which makes the dominating egg mature and ovulated. Within 2 days of ovulating, the follicular sac collaspes and begins producing progesterone which maintains the lining and chances the top surface so the egg can attach. If no egg attaches, the progesterone and estrogen levels drop and you get af. If an egg attaches, it produces hcg within days. In the 3rd month of pregnancy, the placenta takes over making progesterone. The ovaries have no egg growth once the egg implants. You continue to loss eggs but due to the low fsh and failure to have an lh surge, eggs never grow and mature to ovulate.
I’m a nurse plus have been a fertility patient for 5 years. I’ve had 3 major losses (one at 5.5 wks, one at 6.2 weeks and one at 15.5 weeks) After my last lost (the one at 15.5 wks), I was closely monitored. The hcg can linger in the body. It was in my body for a month and during that time, my lining was lining and my ovaries has zero activity. But the next month, I was having regular cycles and back to ttc. I also know the hcg shots can stay in the body for over 14 days. I learned not to take a pregnancy test until I’m 16 days post hcg injection.

Lisa asks…

can ovulation test detect pregnancy faster than hpt?

can ovulation test detect pregnancy faster than hpt? if it detects the lh surge in the middle of your cycle.. which is almost the same as hcg so then would’nt it be a faster way to find out if you are pregnant with the ovulation kit rather than wait till you miss your period?? something to think about
I know they detect two diff hormones BUT the ovulation test does mistake the HCG as well because it is similar to the other! so when you are pregnant the ovulation stick is positive!

Pregnancy Advisor’s answers:

Lh and hcg are two different hormones, and when i took a hpt, i also took a opk strip, the hpt was positive, and the opk strip was negative. So id say use each one for their intended purpose. Good luck!

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