Philipp Marx
Founder of RattleStork
Philipp Marx is a founder of RattleStork and a former international sperm donor. He writes from first-hand experience about sperm donation, co-parenting, and alternative paths to parenthood.
Before founding RattleStork, Philipp donated sperm in several countries. That experience showed him how differently people approach donor conception, trust, personal boundaries, and co-parenting.
At RattleStork, he combines that perspective with publicly available sources and practical guidance for donors, recipients, and prospective co-parents. His personal experience is not a substitute for medical or legal advice.
Articles by this author
Total published articles:220
Ovulation Trackers Compared: LH Tests, Temperature Trackers, Rings, and Apps
Ovulation trackers are tools that narrow down fertile days using hormones, temperature, or body signs you can observe yourself.
HIV self-test: how reliable home testing is, when it works, and what a negative result actually tells you
An HIV self-test can bring quick clarity, but only if you use it at the right time and interpret the result properly.
Who should carry first? How lesbian couples can make a fair, medically sound decision
Figuring out who should carry the pregnancy is rarely a question of preference alone.
Reciprocal IVF: process, role choices, odds, and legal questions in Canada
In reciprocal IVF, one partner provides the eggs and the other becomes pregnant.
Home insemination kits: contents, benefits, risks - what really helps
Home insemination kits are single-use sets for performing one procedure at home: a needleless syringe places the sample close to the cervix.
Ovarian stimulation: how it works, the medications, the risks, and what really matters in IUI, IVF, and ICSI
Ovarian stimulation does not automatically mean producing lots of eggs.
Natural Insemination: Does It Really Improve the Chances?
Natural insemination means trying to conceive through unprotected sex with a donor.
Questions to ask a sperm donor
If you are choosing a sperm donor, instinct alone is not enough.
How do I ask someone if they would be my sperm donor?
Asking somebody whether they would consider being your sperm donor can feel enormous.
Is Your Biological Clock Ticking? 7 Clear Signs and What to Do Next
If you feel like your biological clock is ticking, it is usually about more than age alone.
Getting pregnant as a single woman: realistic options, real pressure points, and a grounded plan
Getting pregnant as a single woman is possible now, but the routes are not equally safe, lawful, or emotionally workable.
Social freezing: freezing your eggs – process, success rates, risks, costs, and alternatives
Social freezing means freezing your eggs earlier in life so they can potentially be used later in fertility treatment.
Dating as a single parent: clear start, safe boundaries, steady progress
Dating can work without overwhelming your everyday routine.
Cross-border fertility: what really matters when care happens abroad
Cross-border fertility care can shorten wait times, widen donor options, or make treatment possible that is not realistically available at home.
Understanding semen: what is normal, what affects quality, and when a check-up is useful
Semen can vary in volume, colour, and consistency more than many people expect.
Supplements for Trying to Conceive: A Straight Guide to Folic Acid, Iodine, Vitamin D, CoQ10, and Inositol
If you search for fertility vitamins, you quickly land on product pages loaded with long ingredient lists and big promises.
Private sperm donation: Which health screenings are advisable and what should you require?
Health screenings can reduce the risk of infections and unexpected medical problems. They cannot eliminate that risk entirely. This is not a pessimistic view but the core of diagnostics: tests have limitations, and something may change between the time of testing and the donation.
Could my child develop mental illness if I have mental health problems?
Many people with depression, anxiety, ADHD, trauma, or severe mental illness know the thought: What if I pass this on to my child?
Mental Health and Fertility: What Matters With Depression, Anxiety, Trauma, and Psychiatric Medication
When trying to conceive overlaps with depression, anxiety, trauma, or psychiatric medication, the topic can move from hope to pressure very quickly.
Testicular torsion: symptoms, time window and what to do immediately
In testicular torsion, the testicle twists around the spermatic cord. The spermatic cord contains blood vessels and the vas deferens. If blood flow is interrupted, testicular tissue can be damaged within a few hours.
Undescended testicle in children: causes, diagnosis, treatment, and why timing matters
An undescended testicle means one or both testicles are not permanently in the scrotum.
Is there an age limit for fertility treatments?
There is no one age limit that applies everywhere.