From my experience with IVF, the ttc is always prior to ovulation. It takes several days for the sperm to actually make the big journey from the vagina to the egg. When we where doing clomid, they would give me a trigger injection and then exactly 36 hours later I would ovulate. They instructed us to have sex a couple of hours before ovulation, usually 9pm the following night if I recieved my injection mid morning sunday and then first thing the morning after. We did not get pregnant this way, and only got pregnant once we commenced egg transfer and exterior fertilisation etc. The fertility specialists where always telling us, that even with fertile couples with no problems, it can take 12 months to concieve and then only 1 in 4 conceptions actually make it . These odds where supposed to make us feel better I guess, they never actually did. I was totally surprised that it was so hard to concieve even without fertility problems. Getting checcked over by your doctors is always a good idea. I never found out I had fertility problems until I was 34!! I am now 38 and due around 19th December....I wish your sister the best of luck.
Angie, DE 15/12/05 ,TAS