Look Who's Talking (1989)

Double-crossed, the lovelorn and very pregnant New York City accountant, Mollie, gets into James' cab and rushes to the hospital to give birth, after a failed attempt at love with a sleazy and self-centered businessman. Suddenly, she is a single working mother, and what is even more disheartening is that she has to embark on the nearly impossible quest to unearth the ideal father for her outspoken son, Mikey. Could it be James?