For each foetal death a certificate of foetal death shall be filed with the local registrar in the usual form and manner. The certificate of foetal death shall be signed by the attending physician or midwife. The cause of foetal death if known and the period of uterogestation in weeks shall be signed by the physician. Burial or removal permits of the prescribed form shall be required for foetuses which have advanced to the twentieth week of uterogestation. Foetal deaths occurring without attendance of a physician shall be treated as deaths without medical attendance as provided for in section 863 of this title. For a foetus which has not advanced to the twentieth week of uterogestation a burial permit may be issued if requested, provided that a physician's signature to the certificate before the issuance of the permit is not required.