My wife left home

Probably you  have tried alone.

Instead now involve elders of the family, well wishers, and attempt to save the marriage.

Your apprehensions about spouse may not necessarily be true.

Let elders also put in their efforts, with their experience and face value and save the marriage for sake of both of you and both families and your unborn child.

Fixed notions about spouse can complicate the married life.

You might be aware that;

Wife has NO forced share in self acquired/earned property of husband.

Wife is not Co-parcener in ancestral property of husband.

DIL has NO forced share in property of MIL,FIL.

Forcing spouse to separate from parents can be termed act of cruelty.

If elders, mediators, well wishers efforts fail and it is concluded that your apprehensions and true to the fore then in case of expected litigation;  Building irrefutable evidence of everything may help in near future.

I would advise you to work on resolving the differences with your wife first rather than thinking about seperation. This is the only thing which you can do under the present scenario.  Put on record all your efforts i.e. to say write emails, messages etc asking your wife to come back.

It will be difficult for you to get custody of a new-born baby.  If your wife does not agree and you have to litigate, you will have to pay maintenance to your wife, if she is not working, and your daughter. 

Many have rightly advised.   Just collect proofs, audio on phne call.   Still make efforts to visit your wife, ne calm, it may happen that during pregnancy due to harmonal changes, women reveal psychological traits.   So do not rush into divorce.   Your baby is going to come into this world wait for that baby.   Make effots to save marriage for that little baby coming into this world.   Let your wife misbehave, but you do not.    Give chance to your wife for the sake of baby.....................be in touch...........................let us solve problems step by step

Many have rightly advised.   Just collect proofs, audio on phne call.   Still make efforts to visit your wife, ne calm, it may happen that during pregnancy due to harmonal changes, women reveal psychological traits.   So do not rush into divorce.   Your baby is going to come into this world wait for that baby.   Make effots to save marriage for that little baby coming into this world.   Let your wife misbehave, but you do not.    Give chance to your wife for the sake of baby.....................be in touch...........................let us solve problems step by step