Must the wife make up for last Ramadan's fasting, knowing that she embraced Islam before last Ramadan and was six months pregnant and did not fast?

All praise is due to Allah, who guided your wife to His religion. We ask Him to keep her steadfast upon it.

She must make up for the Ramadan fast if she embraced Islam before its due time.

It is permissible for pregnant and breastfeeding women not to fast in Ramadan if they fear harm to their health or their babies. They should make up for the missed fasts after their excuse is no longer present.