Written by the Magali Russell
Two lines on a pregnancy test. Anna read them three times in her bathroom in Lucerne.
She laughed, then she cried, and then she noticed the capsule box beside the sink. What happens to her fertility vitamins now?
Women across Switzerland often bring this exact question to us. Working with Swiss doctors as the Swiss Vegan Fertility Leader, we have seen how much clear timing helps at this emotional moment.
This guide explains when to switch from fertility vitamins to prenatal support, one simple step at a time.
Make the change on the day your pregnancy test is positive. Take your usual fertility capsules that day. Start your prenatal the next morning. You do not need to wait for your first medical appointment.
What if the line is very faint? A faint line usually still means pregnancy. Repeat the test after 48 hours, using your first morning urine.
If it is positive again, start your prenatal after positive test confirmation. A blood test with your gynaecologist can also confirm it.
Choosing the right prenatal is the next step after a positive pregnancy test. To understand which nutrients support you and your baby during pregnancy, explore our guide to essential nutrients to look for in a prenatal supplement.
Think of it as two journeys: one prepares the body to conceive, and one supports a growing baby.
Before pregnancy, the focus is on ovulation, hormonal balance and egg quality. After conception, the body starts new work. It builds a placenta, produces more blood and supports the baby’s brain, spine and bones.
Each journey needs different nutrients in different amounts. One formula cannot serve both stages well. This is why fertility vitamins once pregnant are not the ideal daily choice.
Which formula fits your stage?
If you are trying to conceive, +fertiwomen Inositol focuses on ovulation and egg quality. If you are pregnant or breastfeeding, +mum focuses on the needs of mother and baby. Both are formulated by Swiss doctors, vegan, made with high bioavailability forms, and produced to GMP standards.
Learn about women’s fertility vitamins in Switzerland · Learn about prenatal vitamins Switzerland
A preconception formula helps prepare the body for conception. Anna took +fertiwomen inositol with the agreement of her gynaecologist. +fertiwomen Inositol contains 500 mg Myo-Inositol, 400 µg Quatrefolic® folate and 10 mg CoQ10 as ubiquinol.
Research links these nutrients to ovulation and egg quality, especially in women with PCOS or before IVF. Our products were developed with a Swiss FMH gynaecologist.
A positive test changes your nutritional priorities very quickly. A prenatal after a positive test covers these new needs.
Pregnancy needs = more folate + more iron + iodine + more vitamin D3
Iron and folate need a closer look.
During pregnancy, blood volume rises by about 40 to 50%. More blood means the body needs more iron. Low iron can lead to anaemia and tiredness. For this reason, the WHO recommends daily iron supplementation during pregnancy.
+fertiwomen Inositol contains 9 mg of iron. +mum contains 21 mg. Both +fertiwomen Inositol and +mum use ferrous bisglycinate. This form is usually gentler on the stomach. Your doctor may adjust this after a blood test.
Here is reassuring news: the type of folate does not change. Both +fertiwomen Inositol and +mum use Quatrefolic®, the active form of folate known as 5-MTHF. Only the amount rises, from 400 µg in +fertiwomen Inositol to 750 µg in +mum.
Folate supports the neural tube, which becomes the baby’s brain and spinal cord. The neural tube closes about four weeks after conception.
Swiss nutrition authorities advise folate before conception and until the end of week 12. Some women carry MTHFR gene variants, which slow the conversion of standard folic acid. The active form does not need this conversion step.
Many women ask about fertility vitamins once pregnant. In most cases, continuing is not dangerous, but it is not the best choice.
Myo-Inositol, CoQ10, L-Carnitine and L-Arginine were chosen for one goal: conception. Once you reach that goal, they no longer have a clear role in your daily routine. Any use of inositol in pregnancy is a decision for your doctor, this is why the routine should change with a daily intake of +mum.
Fertility vitamin − Myo-Inositol and CoQ10 + iodine + more iron = prenatal
This table compares +fertiwomen Inositol vs +mum, using the values on each product page.
| Feature | +fertiwomen Inositol | +mum |
| Stage | Trying to conceive | Pregnancy and breastfeeding |
| Quatrefolic® folate | 400 µg | 750 µg |
| Iron (bisglycinate) | 9 mg | 21 mg |
| Vegan vitamin D3 | 5 µg | 25 µg |
| Iodine | None | 200 µg |
| Calcium | 10 mg | 125 mg |
| Fertility nutrients | Myo-Inositol, CoQ10, L-Carnitine, L-Arginine | None |
| Daily dose | 2 capsules | 2 capsules |
Last fertility dose today + first prenatal dose tomorrow = no gap in folate
First, leave no gap. Anna took her usual dose on the day of her test. She started her prenatal the next morning.
Second, do not combine the two products. The +fertiwomen Inositol vs +mum table shows that +fertiwomen Inositol and +mum both contain iron, folate and other vitamins.
The same rule applies to twins. Do not double your prenatal dose. Ask your doctor if you need extra folate.
| Stage | What to take |
| Before a positive test | 2 capsules of your fertility vitamin daily |
| Day of the positive test | Your usual fertility dose, then stop |
| From the next morning | 2 capsules of your prenatal daily |
| Breastfeeding | Continue your prenatal |
Knowing when to switch from fertility vitamins to prenatal support is the first step. A few small habits make the new routine easier.
Your nutritional needs can continue to change after pregnancy, especially if you breastfeed. For guidance on continuing nutritional support after delivery, read our advice on maintaining vitamin support throughout the breastfeeding period.
Anna felt nauseous in the early weeks. She moved her capsules from breakfast to dinner, and the routine became easier.
Séverine C. said she felt more balanced in this pregnancy than in her first, when she used a different product. Experiences vary and do not replace medical advice.
Contact your gynaecologist or midwife soon after a positive test. Speak with them early in these situations:
In these cases, you may need a different folate dose or closer monitoring. A supplement never replaces medical diagnosis or treatment.
Anna’s question had a clear answer. The right day was the day of her positive test. Knowing when to switch from fertility vitamins to prenatal support turns a moment of doubt into a simple plan.
Start your prenatal the next morning. Keep your folate active and continuous. Never combine the two products.
As the Swiss Vegan Fertility Leader, Plusbaby designs each formula for one clear stage. Your gynaecologist or midwife remains your main guide during pregnancy.
Your next step after a positive test
+mum provides 750 µg Quatrefolic® folate, 21 mg bisglycinate iron, 200 µg iodine and 25 µg vegan vitamin D3 in two capsules a day.
It is formulated by Swiss doctors for pregnancy and breastfeeding.
Still trying to conceive? +fertiwomen Inositol supports you until the day of your positive test.
Question: How soon after a positive test should I start a prenatal?
Answer: Start the next morning. The early weeks are very important for the baby’s neural tube, which closes about four weeks after conception. Starting right away keeps your folate intake steady. You do not need to wait for your first appointment with your gynaecologist.
Question: Can I take +fertiwomen Inositol and +mum together?
Answer: No. Both contain iron, folate and other vitamins. Taking them together would double several nutrients without a clear benefit. Choose the product that matches your current stage.
Question: I had a chemical pregnancy or a miscarriage. Should I return to my fertility vitamin?
Answer: Speak with your gynaecologist first. When you feel ready to try again, many women return to their fertility formula. Your doctor can advise on the right timing and on any tests you may need.
Question: How long should I take a prenatal after birth?
Answer: A prenatal remains useful while you breastfeed, because your body continues to share nutrients with your baby. Plusbaby suggests continuing for as long after weaning as you breastfed. Our postpartum prenatal guide explains this in more detail.
Medical disclaimer: This article provides general information only. It does not replace professional medical advice, diagnosis or treatment. Always speak with your gynaecologist, midwife or doctor before you start, stop or change any supplement. If you have symptoms or concerns, contact a healthcare professional.
Acheter les produits de cet article
I am Magali Russell, the founder of Plusbaby. With over 15 years of experience in research and development, I created and led a preclinical research organisation that conducted rigorous scientific studies on numerous products.The moving stories of women and couples struggling with infertility left a lasting impression on me. This is how I found my calling in life: helping others become parents by offering them genuine support.
Convinced of the benefits of natural products, I created Plusbaby: vegan dietary supplements, developed in Switzerland, combining proven science and pure, premium, additive-free ingredients to boost fertility naturally.
