I did some more research about the Boshi Techo.
Here is a page on Tokyo With Kids that explains some interesting things about it:
http://www.tokyowithkids.com/fyi/boshi_techo.html
After reading the page on Chiba website (in Japanese), it seems that a pregnancy certificate (妊娠届書) made by a doctor is required to get the Boshi Techo.
Now when i type 妊娠届書 in Google, most websites seem to indicate that in order to get this certificate, the doctor must be able to see the baby's heartbeat (心拍) during the ultrasound.
Here is a page on Tokyo With Kids that explains some interesting things about it:
http://www.tokyowithkids.com/fyi/boshi_techo.html
After reading the page on Chiba website (in Japanese), it seems that a pregnancy certificate (妊娠届書) made by a doctor is required to get the Boshi Techo.
Now when i type 妊娠届書 in Google, most websites seem to indicate that in order to get this certificate, the doctor must be able to see the baby's heartbeat (心拍) during the ultrasound.