No, it has always been like this.

Doctors estimate that up to 60% of all fertilized eggs are miscarried, most before the women even know they are pregnant. People in the past do not know about this due to low sensitivity of pregnancy detection. This 60% number is only the low estimate. Nowadays in china the miscarriage rate is higher than in US due to air and environmental polutions. Women wait until older age to get pregnant also increases the miscarriage age somewhat. It is a natural process.