What Are The Effects Of Crystal Meth On Pregnancy?
not ... really
Detailed Answer:
the basis of dipstick testing (pregnancy AND drug AND drug substance) is an immune protein from animals immunized against the target (whatever target you want; can be pregnancy hormone or a drug). The binding activates a process that triggers an indicator to make a color change. Totally different binding protein for each target you are looking for. Methamphetamine not pregnancy hormone not other drugs.
There might be a slight thirst effect of meth. You might drink a bit extra water and urine might be slightly more dilute. But... doubtful that is enough to do much. More of an issue is how far along the pregnancy is. 2 weeks post conception or about 5-10 days late is when the test starts .. STARTS to become reliable.
It's a separate question about when the harm from methamphetamine starts. I know MUCH of the damage is from decreasing blood flow to the uterus/placenta and that is not early pregnancy.