Is it safe to masturbate using strong shower faucet once a week? is it harmful for pregnant woman?

Here are some...: Masturbating for orgasm can naturally induce genital tract contraction especially the vagina, its effect on pregnant women is controversial & shouldn't differ from intercourse. As to using your innovated vibrating water flow from strong shower faucet, as well, it shouldn't differ from natural orgasm. But, it's more advisable to avoid sex toward the last 3-6 wks of pregnancy. More? Ask doc timely..