5th house has to be seen for santaan sukh in one’s horoscope. It is very important to be seen at the time of matching. As this is the first question one has to answer in the society after marriage. The rashi lords must be friends with each other.
Dirdwadash dosh or shadashtak dosh is important to be checked while matching. If these dosh occurs then their will be problem in the future regarding kids.
If the rashi lords are sitting in 6th 8th or 12th house in any of the horoscope then this is meant that there might be problem in conceiving or at the time of the birth of the child. Late pregnancy is also be seen. So to avoid all these problems in life please do the matching very carefully.