Might have to copy and paste the above link but here is some scientific medial research on Butea Superba (Red Pueraria Mirifica). I use one of the other mirifica species and developed a treatment out of it. Actually working on making one using the Butea Superba. I've had miraculous results with my treatment that I developed. I use WHITE pueraria mirifica. I believe the men use RED Pueraria Mirifica for sexual health, might want to double check that. Hope this helps!
The above link shows some of the nutrient requirements for a healthy pregnancy, and also a simple DIY test, available world-wide, that can help you and your partner check for nutrient deficiences or excess toxic mineral levels.