are pregnancy calculators right or sometimes wrong?
because my girlfriend found out she was pregnant on1/27/09 and i used a pregnancy calculator and it said that my girlfriend’s due date was on 11/3/09 is that right or wrong?
well actually her 2nd period was on 1/27/09
well actually her 2nd period was on 1/27/09
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That may have been her ovulation time. So give or take 2 weeks.
could be i found out on jan 11th and im due sept 17th, when i used the online estimating it came out for sept 18th so if you put the correct info in than you will be fine
It should go by her last period. You would know for sure when she gets an ultrasound.
Well they go by when your last period was, not by when you found out you are pregnant, so I can’t tell you if it was right or not.
The one that I used got down to the exact day he is due. Make sure the info she entered was right.
The pregnancy calculators online are 100 percent correct and work the same as the ones the OB use — as long as you know for sure the exact first day of the woman’s last menstrual period.
You can’t use the date that she found out she was pregnant as a starting point on the calculator. Think about it. Some women find out 7 days after ovulation and some find out when they are already 4 months pregnant.
If you don’t know the first day of the LMP, the OB needs to use other methods of dating the pregnancy, which are less accurate, such as very early ultrasound measurements.
Pregnancy calculators aren’t so much right or wrong, but rather they are used for estimation purposes. There are too many variables when it comes to determining when a baby was conceived or when a baby might be born, so don’t expect a pregnancy calculator to be an exact measurement tool. Average human gestation is considered to be 40 weeks counted from the date of the woman’s last menstrual period. This average is based on assuming that a woman has exact 28 day cycles as well as ovulated on day 14 of that cycle. Many women do not have exact 28 day cycles and if they do, the exact time of ovulation is nearly impossible to predict. To make matters even more complicated, sperm can live inside a woman for several days (even as many as 6-7 days if conditions are optimal). This means that fertilization may not necessarily occur on the day you have sex. When the egg is released from the ovary, there is a window of time, on average between 12-24 hours, when the egg remains viable. Hormones play a big part in determining when the baby has “cooked” long enough and is ready to be born. That is why a due date is known as an EDD (Estimated Date of Delivery). Full term babies can easily come anytime 2 weeks before to 2 weeks after a due date. If you inserted the date of the first day of your girlfriend’s last period than the pregnancy calculator will give you a due date that is an estimate of when the baby will be born.
Your calculation could definitely be wrong. You have to measure from the first day of her last menstrual period (LMP). If she found out she was pregnant on 1/27, she was at least four weeks from her LMP when she found out, right? This would make her LMP happen on 12/30 at the latest, right? If this were the first day of her LMP, her due date would be 10/7/09. However, she probably waited a few days to test, so her LMP was probably earlier than that.
No, the calculators aren’t wrong in predicting the due date, so long as you know the LMP and she has regular periods.