It is also routinely offered to pregnant women between 16 and 32 weeks of pregnancy to help protect newborns until they are old enough to receive their first vaccination.
Mae'n cael ei gynnig hefyd fel mater o drefn i fenywod beichiog rhwng 16 a 32 wythnos o feichiogrwydd i helpu i amddiffyn babanod newydd-anedig nes eu bod yn ddigon hen i gael eu brechiad cyntaf.