Though wikipedia is mentioning this as an inauspicious due to death related rituals - I personally think that is a flawed view of our culture and what the ritual stands for.
Pitru Paksha is about honoring the past, remembering your ancestors, feeding them and repaying the debt to the ancestors.
So with this basis - This is a period when people are doing good, positive things - so it is a highly auspicious time.
Again with or without my opinion on this - pitru paksha
As far as possible - let the nature take its own course in matters of birth and death and you personally be free from judging good time - bad time etc.,
I hope this helps.
With best wishes