Hospitalisation Leave before ML

Hi mummies, FTM here. Im thinking of getting Hospitalisation Leave like 3 weeks before giving birth/Maternity leave. Usually how does HL works? Doe they give you 2-3 weeks first ? And if you have not given birth, theyll give you another HL ? At which week did you get/start your HL and for how long is your HL before your Maternity leave ? I know it depends on gynae if theyre lenient or not. #FTM