The earliest maternity leave can commence is the beginning of the eleventh week before your expected date of childbirth or from the time of childbirth if that is earlier.
Yr adeg gynharaf y gall absenoldeb mamolaeth gychwyn yw dechrau’r unfed wythnos ar ddeg cyn dyddiad disgwyliedig yr enedigaeth neu o adeg yr enedigaeth, os yw’n gynharach.