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If you have had a normal period after having intercourse, then the chances of the intercourse on 25th June being fruitful can be ruled out. If your due date has been given as April 7th, 2012 (completion of 40 weeks of gestation), and if your last periods was on 2nd July, 2011, then your probable ovulation day would be around July 16th, and your probable conception days would lie between July 12 â 20, 2011 (calculation based on regular menstrual cycles of 28-30 days). If the ejaculation happened on the 13th July, then chances of it being fruitful are possible as healthy sperms can stay alive for 3-5 days inside you. The intercourse without ejaculation is also possible to have resulted in pregnancy (pre-cum/pre-ejaculatory fluid is known to contain sperms in it) as it was just after your probable ovulation day, but the chances are less, as number of healthy sperms being present in it is lesser than a complete ejaculate. However, the exact results can only be made out after a Paternity test. Visit your doctor/gynecologist for further discussion and assistance.
Take care.