Hi there!
You or your partner could use contraceptive measures to avoid children. These may be temporary such as pills, IUDs etc for females, condoms for male; or permanent such as tubectomy/ vasectomy etc. You may consider consulting a primary care physician or a urologist for a detailed discussion before choosing the best suitable mode of contraception in your case.
Hope this is helpful.
Take care!
is a doctor here in this forum please?