How long does it usually take for maternity pics

To be done? I know it varies from photographer to photographer. But I feel like we’ve been waiting for ours for a while now.. (4 weeks) some of the people that have reviewed her say how great she is because she gets their photos back in 3 days (Her work Is good, but our waiting time seems to be very long..) After I get these photos back from her, I kind of want to tell her not to worry for the new born session. I am already looking for another photographer to do his new born pics!