Answer:
(1) The husband pronounced the words of talaq and admits it; in this case, three talaqs mughallazah (irrevocable talaqs) took place. There is no condition of witness to pronounce talaq; the confession of husband is also enough.
(2) Talaq takes place though the wife is pregnant.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
