This is probably the case as does will eventually ditch the previous year's offspring to continue the cycle of raising their newborn.The young deer (spike buck and doe) are usually the "most challenged deer in the woods" simply because they have just been kicked out of the family unit and depend upon their own instincts for survival with no maternal help.One of three possibilities with the maternal doe would explain the current situation---reproductive issues that prevent the doe from becoming bred-----loss of the unborn during term---or perhaps the fawn(s) were born dead or perished early in life and the doe has reunited with the previous offspring.

This is probably the case as does will eventually ditch the previous year's offspring to continue the cycle of raising their newborn.The young deer (spike buck and doe) are usually the "most challenged deer in the woods" simply because they have just been kicked out of the family unit and depend upon their own instincts for survival with no maternal help.One of three possibilities with the maternal doe would explain the current situation---reproductive issues that prevent the doe from becoming bred-----loss of the unborn during term---or perhaps the fawn(s) were born dead or perished early in life and the doe has reunited with the previous offspring.

I'd agree that she's probably with last year's fawns, but the cause of this year's missing fawns is not as likely her infertility as it is a coyote or three picking off an easy meal this spring shortly after they dropped - unless you had a hard winter, in which case she may have aborted the fawns spontaneously. In any case, you can certainly thin the herd without having to feel guilty about orphaning a young fawn if you continue to see her without into bow/gun season when this year's fawns would become more mobile and will stay by her side instead of hiding in the thick stuff.