Hii

Hi avoid in 1st and last 3 months, 4th 5th and 6th months are safe provided there is no complications in pregnancy.

Its better to avoid

<font color ="#3b5998"><b><a href="http://app.babychakra.com/article/3742">Is It Safe To Have Sex During The Second Trimester?</a></b></font> <br> <font color ="#3b5998"><b><a href="http://app.babychakra.com/article/2483">Medical Reasons To Avoid Sex During Pregnancy</a></b></font>

If your wife don't have any complications in pregnancy then you can.. Ask your doctor and get green signal.