Dua for Blessing of Pregnancy

اللّهُ يَعْلَمُ ما تَحْمِلُ كُلُّ اُنثى و ما تَغيضُ الارْحامُ و ما تَزْدادُ و كُلُّ شَئٍ عِنْدَهُ بِمقْدارٍ(8) سورة الرعد

Allahu Yaalamo Ma Tuhmelo Kulu Ontha Wa Ma Tagheedo Al Arhaamu Wa Ma Tazdad Wa Kulu Shain Indahu Bi Miqdaar (8)

Allah Knows what every female bears, and the lessening and growing of the womb. Everything with Him has a measure.