وَلَا تَقْتُلُوا أَوْلَادَكُمْ خَشْيَةَ إِمْلَاقٍ نَّحْنُ نَرْزُقُهُمْ وَإِيَّاكُمْ إِنَّ قَتْلَهُمْ كَانَ خِطْئًا كَبِيرًا

And do not kill your children for fear of poverty; We give them sustenance and yourselves (too); surely to kill them is a great wrong.(Al Isra17/31)
It really shameful and inhuman act if anyone kills his/her child either it is in the form of Foetus or it has grown but still not born.
There is a reason behind this that every owner of soul and life has his/her own destiny. Parents are only means to bring them in this world. But we are From Allah (Olny Allah is our creator) and we will go to Him. While in between life in this world is a test from Allah to show our ability. Therefore we have no right to kill any child while Doctors say he/she has any disability in his/her organ.
Of course in your friend’s case even there is no such issue neither child is disable nor mother has life threatening issue. Then how? What what basis he think to kill this child. More interesting there are many examples that there are many people who has done such brutal act thereafter they failed to have another baby due to the process of abortion.
So please tell him it’s murder of an innocent don’t do this. On the Day of Qiyamat this same child will as on what crime you killed me….. for such people there is Hell fire nothing else