Changes in preterm and extremely preterm birth rates in Japan after the introduction of obstetrical practice guidelines in 2008.
Satoshi ShimanoTakashi YamadaKazutoshi ChoKazuo SengokuTasuku MariyaTsuyoshi SaitoPublished in: The journal of obstetrics and gynaecology research (2023)
In Japan, after obstetrical guidelines were enacted in 2008, PTRBs decreased significantly even under the pressure of increasing preterm births. Countermeasures may be necessary for regions showing high PTBRs.