Infertility is not very much common in women but yes they are lacking in sexual interest which takes time to recover.
It can be because of physical changes, work load or pressure, hormonal imbalancing where women start avoiding her partner. Does not want to make love and so start getting away from hi, not sharing anything much.
Early sleeping and making distance will create problem in their relationship.

You can try for herbal pills as there are other methods are available but as for the first time, herbal pills are risk free, with no side effects and 100% safe effective solution. It will helps you to overcome the situation.