Where does "Life of Ichabod" come from?
You're looking for the イハーブの生活 (The Life of Ichabod) manga by Shouji Hiroyuki. It's spans 3 volumes.


  (Ichabod) is the boy who was born by artificial insemination as a child of two women. Elly of the part of father disappears, and it is a family of mother and child with Mary of the part of mother. Ihabu is rebuked by Mary that "you were born as a man is our greatest failure." One day, he cuts off his penis, and he looks for real father registered with a sperm bank and goes for an odyssey.


It was originally published in Kodansha's Afternoon magazine