Do you have lesbian/gay couples with biological kids?
As since the gender patch we can have without need of mods,females than can get pregnant other sims and males than can become pregnant*, do you have as main family a houshold of 2 mothers or 2 fathers...
My Sims are almost all male couples with biological kids. I love this feature (though I found the hospital manufacturing in TS3 ITF even better - hope they bring this back).