In addition to that, an inordinate number of gay couples have children from previously heterosexual relationships. I personally know people who fall into the following categories:
- A lovely bisexual woman had a child with a man, they split, now she's in a relationship with another woman, they're raising the child together.
- Many gay men "play it straight" for years in hetero relationships, they have kids, but it just doesn't work out in the end. They leave their wives to start relationships with men.
- Last night I met two women who shared a story with me of how they realized they were lesbian later in life (early 30s and early 50s respectively), both had children, both are presently in stable relationships with their wives.
- Many transgender women transition later in life after having a family, most of the time this breaks up a marriage. These women may have relationships with men or other women in the future.
I believe the 2010 census indicated some 25-30% of gay couples are raising children. This percentage will include children were conceived in prior heterosexual relationships, children adopted or fostered by same-gender foster parents, and children conceived though in-vitro or surrogate mothers.
My favorite "modern family" story is the life of Christine McGinn, a transwoman who, prior to her SRS, banked her sperm. After meeting her cisgender wife, they decided to have a child, so they used her sperm have a child with her wife, their child was conceived and born quite healthy. While her wife was pregnant, Christine took hormones to promote lactation, which allowed her to nurse her own child. She and her wife were featured on Oprah's "real modern family" episode, they were such a lovely couple