According to the Evan B. Donaldson Adoption Institute the number of infants available for private domestic adoption is decreasing:
“Number of Infants Available for Private Adoption Has Been Decreasing A variety of factors, including increased access to contraception, the legalization of abortion and changed social attitudes about unmarried parenting, have caused the number of white infants placed for adoption in the U.S. to decline dramatically. Between 1989 and 1995, 1.7 percent of children born to never-married white women were placed for adoption, compared to 19.3 percent before 1973. Among never-married black women, relinquishment rates have ranged from .2 percent to 1.5 percent.”
I couldn’t find statistics for the last 10 years but I’m sure the numbers have steadily decreased. If you have friends or family that advise you to “just adopt” you can gently share these statistics. It is a very difficult process and the number of babies available makes it even more difficult. It is not impossible but hard. You can read the full article here.