Ikä ja tärpin todennäköisyys -linkkejä

Pyörin tuolla yhdellä ulkomaisella keskustelupalstalla ja löysin sieltä tämmöisiä.



http://www.babyworld.co.uk/information/trying/secretsofconception.asp



The chances of getting pregnant in each cycle vary according to a wide range of factors, but perhaps the most important one is the woman¿s age.



- For a woman aged 20-25, the chances of conceiving are around 25 per cent for each cycle (that is a one in four chance)

- For a woman aged 30-35, the chances are 15 per cent, and thereafter the likelihood of becoming pregnant continues to decline with increasing age

- It will take a couple in their early twenties an average of five cycles to conceive

- Women in their early thirties will get pregnant, on average, after nine cycles

- One in ten couples will take more than a year to succeed in conceiving



http://www.fertilityplus.org/faq/opk.html



It often takes a number of perfectly timed cycles before pregnancy is achieved. The chances of getting pregnant each cycle varies a bit with age. If you are 20-25, your chance per cycle are about 25%. From there they begin to fall off. At 25-30 your chances are about 20%. At 30-35 they are about 15%. After 35 they may be about 10% per ovulatory cycle, and the chances continue the downward trend.



This means that the average woman under 30 will get pregnant within 6 cycles. If you don' t succeed after a year, it is a good idea to consult a fertility specialist. Women in their early 30s get pregnant on average by the end of 9 cycles. Mid-30s would be a year. If you are over 35, you should consult a fertility specialist if you have not achieved pregnancy within 6 months. Why 6 months when it can take a year? Because your chances of conception are lower and miscarriage rates are higher -- it is better not to waste time.





http://www.brighamandwomens.org/healthinfo/Infertility%20Booklet.pdf



About 20% of couples who are trying to become pregnant will be successful in the first month; 50% after 3 months of trying; 75% after 6 months of trying; and 85-90% after 12 months of trying. About 10-13% of couples do not get pregnant even after a year of trying.



Effects of the Mother' s Age on Pregnancy Rates



Age Group

Pregnancy Rate (within 12 months of trying)



20-24

86%



25-29

78%



30-34

63%



35-39

52%



http://aolsvc.health.webmd.aol.com/content/article/82/97233.htm



Your chances of getting pregnant each month depend on many factors such as your age and how long you have been trying. But in general:



- There is a 15%-25% chance of becoming pregnant in each ovulatory cycle. But you need to do everything right.

- About 40% of couples starting out will conceive during the first three months of trying.

- About 70% of couples will conceive during the first six months.

- Up to 85% of couples will conceive within the first year.

- About 50% of couples who have not been able to conceive within one year will still be able to get pregnant on their own in the second year.



http://humrep.oxfordjournals.org/cgi/content/full/18/9/1959

(tässä tutkimuksessa mukana olevat käyttäneet FAM-metodia (fertility awareness method) eli lämpöjen mittaus, limojen tutkiminen jne)



Kyseessä saksalainen tutkimus. Ne jotka tulivat raskaaksi (iästä riippumatta), heistä 42% tuli raskaaksi kuukauden kuluessa, 75% kolmen kuukauden kuluessa, 88% kuuden kuukauden kuluessa, 98% vuoden kuluessa. Ikä vaikutti siten (katso kuva 4 artikkelissa), että 31-35 v hedelmällisistä naisista raskautui 68% 3kk kuluessa ja n. 85% 6kk kuluessa. (käänsin tämän keskustelupalstalta, en itse jaksanut kahlata koko tutkimusta läpi.)