Will any of the following ingredients and daily doses adversely affect an unborn baby.
Vitamin C 350mg
Vitamin B6 65mg
Calcium 120 mg
Magnesium 332mg
Selenium 1330 mcg
Potassium 142 mg
Garlic, Hawthorn Berry, & cayenne Powder 534 mg
L-Taurine 167 mg

Prenatal vitamins that are prescribed by your doctor provide the sufficient amount of daily vitamin.
Too much of anything can be harmful and that includes vitamins.
This is a question best answered by your OB/GYN.