1) Before being born 2) Before birth 3) Developing, biologically 4) Fetal position 5) Gestating 6) In the uterus 7) Inside the womb 8) Like some surgery 9) Not yet born 10) Not yet delivered 11) Phrase for very early testing 12) Soon to be delivered 13) Still developing 14) Still undelivered 15) Unborn 
In utero is a Latin term literally meaning `in the womb`. In biology, the phrase describes the state of an embryo or fetus. In legal contexts, the phrase is used to refer to unborn children. Under common law, unborn children are still considered to exist for property transfer purposes. ...
(from the article `Nirvana`) Like Nevermind, the band`s third album, In Utero (1993)—which contained clear articulations of Cobain`s psyche in songs such as All Apologies and ...
Within the uterus.
A term meaning within the uterus. ... (09 Oct 1997) ... 
(in u´tәr-o) Latin phrase meaning inside the uterus.
Within the uterus.
Inside the uterus
in the uterus; refers to events that occur in the womb before birth.
Type: Term Pronunciation: in yū′tĕr-ō Definitions: 1. Within the womb; not yet born.
Referring to the time frame that the fetus is growing and developing inside of the uterus or womb.
Within the uterus.
[adv] - in the uterus
in utero In the womb. Prenatal; not yet born.
adverb in the uterus; `the child was infected in utero from the mother`
Within the uterus. 
Within the uterus. 
in the uterus; unborn.
Inside the uterus.