Acidophilus is just one type of probiotic. When you get a good probiotic blend it contains many different types to cover the broad spectrum of beneficial bacteria in the gut.For example, the brand I take has acidophilus, rhamnosus, casei, plantarum, B. longum and B. breve. These other types are not normally something you would find in keifer milk or yogurt, you have to buy the probiotic blend to get them.
As for the dosage, I would check with a health food store clerk ( that's where you're going to have to go to get a good blend anyways) and see what they say, or contact your PCP. I would guess the dose would be the same as a non-pregnant adult, which for the brand I take is 1-3 capsules per day.
How I do my laundry is this, I put the baking soda in the bottom of the washer and add the water, then put in the clothes and then use a downy ball filled with vinegar that sits on top of the clothes. The baking soda is rinsed away by the second rinse which is when the downy ball releases the vinegar, so I would imagine that there is no contact between the two that would nuetralize the two agents, one starts at the beginning and one comes in at the end, KWIM?
Just out of curiosity, let me know if pregnant women should be taking a different dose than non-pregnant adults, I would like to know the answer to that myself.