had happened at philadelphia zoo since 1994. >> it is surreal heart heart honey, a 21 year-old momma gorilla will soon have a baby to protect. >> that is great because the baby gorilla is coming out from a mom's belly. >> probably come every couple of weeks, they love it. >> reporter: check out this result sound photo taken by zoo staff a peak at growing baby grill. >>> they were able to see, limbs moving and fingers, you know, development. >> reporter: few weeks ago over counter pregnancy test confirmed what zoo staff suspect. >> the same that you would use in your home. >> her belly has definitely popped out. >> reporter: baby will be a welcome addition. honey is western lowland gorilla one of five of her kind at the fail zoo. >> critically ending nerd our habitat through a combination of habitat loss, poaches, the bush meat trade and in fact most recently they are impact by things like ebola a. >> reporter: while they are carefully following honey's pregnant see. >> able to look at different body parts and in case there were an injury. >> reporter: so far, so good. the zoo says they will