23.04.2015

## How long to get pregnant

Given the MFR, the probability of getting pregnant after a given number of months can be calculated with a negative binomial distribution. So almost half of the (healthy) 25 year olds get pregnant in the first monthtwo months, and after two years (the point when doctors start considering you to have fertility problems) more than 90% of 35 year olds should conceive.
This is the argument I used with my husband to get him to start trying immediately (i was 36 at the time and i told him it would take at LEAST a year to get pregnant). You should take into account that woman get older during next attempts to become pregnant, so MFR will decrease.
This analysis seems generally optimistic, especially because most of the age groups show a 100% of getting pregnant eventually.
Even if you don’t consider this extreme case where MFR=0, this uncertainty on the MFR clearly has a strong influence on the curve and on how to interpret it. On your curve, with MFR=0.05, a woman has 85% chance to be pregnant after 3 years and 95% after 5 years. Another confusing issue is how to handle subjects who become pregnant multiple times in the data. An MFR of 0.25 means that one quarter of 25-year olds will get pregnant in the first month.

On a more practical note, my wife got pregnant within two cycles of starting to use an electronic ovulation tester.
I had a ectopic pregnancy that ruptured and was told that I wouldn''t be able to concieve-I''m not sure if I lost a tube or an ovary. I have been on the combined pill for 10 years and been told that I could have problems gettting pregnant.
I had a tubal ligation done years ago and then recently had both my tubes removed because of an ectopic pregnancy.
I gave birth 6 months ago, stopped breastfeeding 1 month ago and have had no signs of a period yet somehow I am pregnant again.
At my HSG dye x-ray the nurse could not continue as she could not get the catheter tube through my cervix, which I believe is not uncommon. I had an etopic pregnancy in 2005 and the removed my right fallopian tube and she noted that the left tube is clubbed.
I've just had an operation to remove my tube due to an ectopic pregnancy and have now found that the other tube is scarred, I have damage to one ovary and also a bulky retroverted uterus. I missed three contraceptive pills in a row, and had an emergency contraceptive pill on my GP's advice, however I've now missed my period, although a pregnancy test came up negative.

I have been having unprotected sex for a year and a half and I still have not got pregnant. The figures that are most often quoted are that out of every 100 couples trying for a baby, 80 to 90 will get pregnant (conceive) within one year. In the case of extreme infertility problems (for example, you’ve had a hysterectomy and thus have no womb), the MFR is zero, and the chance is getting pregnant is zero over any time period.
As you are not pregnant after trying for longer than that I would advise that you and your partner see your GP so that you can have some basic tests done on your and your partnerâ€™s fertility. This suggests that by 12 months, 90% of those who will ever get pregnant naturally, already have. However, it becomes possible to statistically assign couples to one of these groups based on time trying and a little bit of medical history, and then provide a much more realistic assessment of the chances of natural pregnancy. It is impossible to say how long it will take before you get pregnant, as this depends on all sorts of other factors-when you have intercourse, tubal factors, sperm count to name a few.