Hello,
Alcohol consumption is one of the causes of infertility in men. Ask your partner to get his semen analysis done. Other than that, stress can be one of the causes of secondary infertility(difficulty in conceiving even after one pregnancy).But there are host of other causes like age, taking up alcohol or certain drugs that causes infertility, food, coffee, and many causes beyond these. Infertility starts to kick in slowly from age 30 and more rapidly from age 35 onwards in women.
Moreover,medical causes may be due to problems in ovulation,tubes,uterus,cervix,endometriosis,pituitary,hypothalamus or secondary male infertility. Also,the quality of egg and sperms decrease with advancing age.Exact cause for difficulty in conceiving can only be diagnosed by investigations to weed out the various possibilities and then confirming a diagnosis.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Yes, alcohol can effect sperm in men. Have you thought about talking to your boyfriend about getting his drinking under control before having a baby?