See there are two births or maybe three depending on where the scriptures go.
the birth of Christ
the birth of Israel
and the birth that belongs to Zion
Now Jesus has already been born... and not a manchild...I use to think Revelations was discussing the bith of Jesus. It cannot once the scriptures are searched and studied.
See some think the woman is the old testament church, the birth ..the christ that the devil had tried to kill as well as the new testament birth that occurs from the failure of the devil and victory in Christ..there is similariry to Josephs dream he had in Genesis. I consider this to be a probability but not good enough.
Later it tells us of her later offspring which I believe is the Church...Zion..Israel...it all has to do with waht I will call something called fusion imagery. Where a symbol can take on more than one meaning
The question posted is a question that has beed debated for a long time.
It really is something for the individual to take to God for the symbolic imagery is many...
Since revelation are things revealed and a book of new things I take that into account.
The stars can also mean the tribes of Israel as well.
There is also a birthing in the Spirit with travail that happens... thus bithing and bring forth without physical signs of pregnancy... thus being Spiritual pregnacy.
I do not wish to confuse anyone yet I think there are many options here to truth and do not want only my personal belief to be of influence.