Pregnant but Negative Urine Preg? - page 3

Hi all! I'm an ER nurse, and had a pt last noc who swore up and down "there's no way I can be pregnant....my period is 4 days late, but I took a test (urine) this morning and it was negative" The... Read More

  1. by   mayflower2000
    i have a friend who hasnt had a period for three months. had a urine
    pregnancy test for how many times but they were all negative. had blood test but still negative.she went back to see her gp because her tummy was getting bigger. she had an ultrasound and a heartbeat was seen. her baby is now 4 years old and healthy.
  2. by   33-weeker
    Not so supprising... urine tests are not as sensitive as blood tests. Maybe she ovulated late in her cycle and the HCG was not high enough to trigger the urine test.

    I've had negative home pregnancy tests when a period was noticibly late - despite tender breasts, pets acting strange, etc. - only to have a horrible, heavy period that was suspicious of a very early miscarriage.

    When I got pregnant with twins, I couldn't stand waiting. My breasts had been tender since just 3 days after we 'tried'. I just KNEW I had to be pregnant. Sure enough, a home urine preg. test was positive 3 days BEFORE my period was even due.

    I sat there wondering, 'hmmm... why is my HCG so high?.....'

    LOL Little did I know there were TWO in there! :roll :roll
  3. by   BethBSN
    Quote from RunnerRN
    Hi all! I'm an ER nurse, and had a pt last noc who swore up and down "there's no way I can be pregnant....my period is 4 days late, but I took a test (urine) this morning and it was negative" The doc wanted to do a serum beta, and lo and behold PREGNANT! Thought I would come to the source and see if any of you guys know how common this is. I've had a couple in the last 6 months (one was a urine preg we did 2 days previous, pt came back and we did a beta).

    Anyone know what the percentage is of women who don't show positive on urine HCGs?
    Blood serum preg test for HCG is more sensitive than urine...so will show up sooner on the serum test.
  4. by   Nursetobejmm
    When a female is pregnant their hormones start to elevate and "usually" is detected when a pregnancy test is taken and will show positive. I have "heard" that after being pregnant for approximately 4 months and she takes a pregnacy test, the test may show a "negative" because at this time the hormones are not as elevated as they were when conception took place.

    Another issue I recently learned that I think is interesting:
    When a female takes birth control pill it causes her pituatary gland to think she is pregnant. Then the 5-7 days she is menustrating she is actually off the pill, she takes a pill but they are just sugar pills (the white ones). At this time her body says "oh, I'm not pregnant" and sheds the material during menustration. I took birth control for a very short time because I was getting morning, afternoon, and midnight sicknesses. Now I know why, because my body thought I was pregnant and this is what will most likely happen if I ever get pregnant. While you are on the pill women tend to gain weight as if they were pregnant and thier breast may get larger as well. Makes you wonder: if you are on the pill for a long period of time, your body thinks you are pregnant all the time, this can't be good for you??

    My information is based on my anatomy and physiology course I am currently in so if there are any clarifications please post. Thanks! Hopefully I will get into the Nursing Program June of 2007!!!!!!
  5. by   pekinsweety86
    Quote from Nursetobejmm
    Another issue I recently learned that I think is interesting:
    When a female takes birth control pill it causes her pituatary gland to think she is pregnant. Then the 5-7 days she is menustrating she is actually off the pill, she takes a pill but they are just sugar pills (the white ones). At this time her body says "oh, I'm not pregnant" and sheds the material during menustration. I took birth control for a very short time because I was getting morning, afternoon, and midnight sicknesses. Now I know why, because my body thought I was pregnant and this is what will most likely happen if I ever get pregnant. While you are on the pill women tend to gain weight as if they were pregnant and thier breast may get larger as well. Makes you wonder: if you are on the pill for a long period of time, your body thinks you are pregnant all the time, this can't be good for you??

    My information is based on my anatomy and physiology course I am currently in so if there are any clarifications please post. Thanks! Hopefully I will get into the Nursing Program June of 2007!!!!!!
    Theoretically that is what happens. I have been on birth control pills for a total of about 18 months, and have been pregnant twice....and the side effects from the pills had NOTHING on the symptoms of pregnancy.
  6. by   CEG
    Quote from Nursetobejmm
    Makes you wonder: if you are on the pill for a long period of time, your body thinks you are pregnant all the time, this can't be good for you??

    I would tend to agree that it probably negatively affects the body to be on the pill for a really long time, but actually the suppression of ovulation and it's associated hormones has been found to have a protective effect against ovarian cancer. Simliar to breastfeeding.
  7. by   mercyteapot
    Quote from RunnerRN
    Hi all! I'm an ER nurse, and had a pt last noc who swore up and down "there's no way I can be pregnant....my period is 4 days late, but I took a test (urine) this morning and it was negative" The doc wanted to do a serum beta, and lo and behold PREGNANT! Thought I would come to the source and see if any of you guys know how common this is. I've had a couple in the last 6 months (one was a urine preg we did 2 days previous, pt came back and we did a beta).

    Anyone know what the percentage is of women who don't show positive on urine HCGs?
    Not sure how common, but I do know it happened to me. I had 2 come back negative before the 3rd was positive. As an aside, I always wondered if I was producing less HCG and that's why I didn't have vicious morning sickness the way my Mom did for all her pregnancies and 2 sisters had with their's.
  8. by   flytern
    I'm with you Mercyteapot. Have had 3 kids, absolutely no morning sickness with any. Very screwed up periods since being a teenager. Never regular. With all 3 kids didn't know I was pregnant until about 20 weeks! (felt movement) In fact, was having a pre-op physical for a tubal ligation when I found out I was pregnant w/the 3rd. All HPT's were negative.

    Co-workers were so mad that I could keep a secret for so long. Couldn't understand why I didn't tell them I was pregnant earlier!

  9. by   lpnursej
    I had false-negative blood tests x3 when I was pregnant with fourth child and doctor's response was "you are just being paranoid," when I told him I was 100% sure I was pregnant.I gave birth to a 4 lb baby boy at an estimated 7 mos gestation.The only explanation I recieved from doctor know-it-all was that my hcg must have been extremely low...LOL!!!!
  10. by   medsurgnights
    I had a negative urine-HCG a 2 weeks ago, and figured that I must just have had a stomach flu and my normal irregular cycle. Stayed queasy, and had a positive test 3 days ago. Was checked for ectopic pregnancy d/t Dr.'s concern about cramping on one side, but ultrasound showed normal findings for being 7-8 weeks pregnant. I had been faithfully taking birth control pills for 4 years, I guess life finds a way.
  11. by   ktliz
    Quote from Nursetobejmm
    When a female takes birth control pill it causes her pituatary gland to think she is pregnant.
    ....
    While you are on the pill women tend to gain weight as if they were pregnant and thier breast may get larger as well. Makes you wonder: if you are on the pill for a long period of time, your body thinks you are pregnant all the time, this can't be good for you??

    My information is based on my anatomy and physiology course I am currently in so if there are any clarifications please post. Thanks! Hopefully I will get into the Nursing Program June of 2007!!!!!!
    Learned this in my bio prereq and am posting here instead of studying for my final tomorrow

    Another way to look at it is, the pill makes the body think "Oh, I MIGHT be pregnant" which is the normal response after ovulation. When ovulation occurs, a corpus luteum is produced which secretes progesterone, inhibiting the hormones that cause oocyte maturation while at the same time maintaining the uterine lining in case of conception. If pregnancy doesn't occur, the corpus luteum dies around 14 days later and the lack of progesterone allows menstruation to begin and allows the hypothalamus and pituitary to start making the hormones that cause ovulation. So what a pill does, basically, is imitate the function of the corpus luteum.

    I think what my point is, is that I don't think its too bad for you because its imitating a portion of the cycle that a woman's body spends about half its time in anyway.

    Now those pills that keep you from having a period every month- Seasonale- those I'm not too sure about. I admit, I have used my NuvaRing to postpone my period by a week when it was scheduled to come at an inconvenient time, but I'm not sure I would want to not have one on a regular basis. It just seems like such a cleansing process... I know that when I postpone my period for just a week (possible TMI coming up...), the stuff that results is not pretty!!

    I'm so off-topic now.. oops!!
  12. by   KnoxWarEagle
    Both pregancies I had negative tests. I had low progesterone and had to take suppliments. I don't know if this had anything to do with this but I was WEEKS late!
  13. by   JeanettePNP
    Quote from KnoxWarEagle
    Both pregancies I had negative tests. I had low progesterone and had to take suppliments. I don't know if this had anything to do with this but I was WEEKS late!
    Weeks late giving birth?

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