Can a man ?still?father ?kids after prostate cancer surgery?

Yes, but...: A man will not be able to father children through natural intercourse however will still produce sperm, which can be extracted to combine with a woman's eggs.

No: During prostate cancer surgery, the vas deferens are intentionally cut which will block the transport of sperm during ejaculation.

Prostatectomy: Eliminates the organ that produces seminal fluid (the testis makes the sperm). Nerve sparing can allow for erction and orgasm, but ejaculate and juice are eliminated by gland removal. The testis may make sperm that can be extracted to fertilize in vitro.