Why the Ladies are prevented from prostrate adoration (Sashtanga Namaskaram) to the God ?

In all our Hindu sacred places like Temples, in the Pooja Mandir, Homa, Yagna etc., the Gents are allowed to do the prostrate adoration to the God or even to the Swamy jis. Prostrate Adoration means the body’s eight parts i.e., chest, forehead, two hands, two legs, the two eyes. With these eight parts we have to touch the ground do the adoration. This is called Sashtanga Namaskaram.

But it is restricted for ladies to do that. When a lady does that prostrate, the stomach touches the ground. The stomach has the foetus. If she does like that, any harm may be happened to the womb. But it is said the lady can do the adoration by sitting on her knees and she can do the adoration by bendin her waist