Hair all could be due to many reasons ranging from,
thyroid disorder to anaemia and many more. Haircycle has many phases like Anagen that is the growth phase, catagen , telogen, Kenogen and exogen. During pregnancy the anagen phase is increased and the telogen phase is decreased that is harmonal, following delivery it gets back to same level as prepregnant and their is increased in hair fall experienced in almost all females post delivery. Kindly send photos and do online consult so can do few tests and go ahead with treatment.