And there is no way that you can monitor every pregnancy that occurs in the country.

oh yes there is.

make the purchase of pregnancy tests require an id.

each pregnancy test is issued with a unique serial number.

every purchased pregnancy test must be returned and registered within 30 days.

anyone who returns a positive pregnancy test is issued a "(pre)birth-certificate" and if they don't produce a living child in approximately 9 months

they will be investigated for child endangerment and or criminal negligence and or manslaughter and or murder

problem solved