Hi Ash I am going to give you my opinion based on your birth details of yours and your mrs.
You are born in Ashwini star, Mesh Rasi having Kanya Lagna having Moon dasa.
Your are wife born in Hastha Star Kanya Rasi having Magar Lagna.
I had analysed your chart and also concern chart for progeny.
Although Husband chart having positive phase now Wife chart is not having that phase. Well you will be blessed with Baby during 2019 Feb On Wards as both will have dasa and bukthi in concerned chart governing progeny.