Retrograde Sani: rules 4 and 5 house(s)
The retrograde lord of the 5th house may cause delays in childbearing, problems conceiving, or the person is simply in no hurry to have children. Usually this indicates a small number of children.
The retrograde 4th lord — karmic relationships and debts towards the mother. Makes it difficult to express emotions.
Source: Rami Bleckt