Ngenjwayelo, umama ozozala ubuyela ewadini yababeletha ngosuku olwandulela ukuqubuka kwesifo. Umbelethisi uyaqinisekisa ukuthi udokotela obulala izinzwa ubonwe ngokubonisana, nokuthi konke ukuhlolwa okudingekayo kwenziwe. Khona-ke, wenza ukuhlolwa komlomo wesibeletho, bese eqapha, ukuze lawula ukushaya kwenhliziyo yengane futhi uhlole ukuthi kukhona yini ukufinyela kwesibeletho noma cha.
Ngakusasa ekuseni, ngokuvamile ekuseni, siyiswa ekamelweni langaphambi komsebenzi ukuze kuqashwe kabusha. Uma umlomo wesibeletho "ungalungile" ngokwanele, udokotela noma umbelethisi kuqala usebenzisa i-prostaglandin, ngendlela yejeli, esithweni sangasese, ukuze athambise futhi akhuthaze ukuvuthwa kwayo.
Khona-ke ukuthakwa kwe-oxytocins (into efana nehomoni ebangela ukubeletha ngokwemvelo) kufakwa emahoreni ambalwa kamuva. Umthamo we-oxytocin ungashintshwa kuwo wonke umsebenzi, ukulawula amandla kanye nemvamisa yokufinyela.
Lapho nje ukufinyela kuba okungajabulisi, i-epidural ifakiwe. Bese umbelethisi ehlephula isikhwama samanzi ukuze ukufinyela kuphumelele futhi avumele ikhanda lomntwana ukuthi licindezele kangcono emlonyeni wesibeletho. Khona-ke ukubeletha kuqhubeka ngendlela efanayo nokubeletha okuzenzakalelayo.