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
Unnoticed pregnancy loss: understanding biochemical pregnancy, early miscarriage and missed miscarriage properly
Unnoticed pregnancy loss refers to very early or low-symptom pregnancy losses that may first come to notice through a test, bleeding or an ultrasound.
Superfetation: Can someone become pregnant again during an ongoing pregnancy?
Superfetation means that after a pregnancy has already started, another ovulation, fertilization, and implantation would happen.
Twins, Triplets, and Multiples: Real Odds, Risks, Follow-up, and Better Decisions
A multiple pregnancy is not some exotic edge case, but it is also not just a regular singleton pregnancy with additional babies.
Understanding superfecundation: How dizygotic twins can start in the same cycle
Superfecundation sounds dramatic, but biologically it is mostly a timing issue within the same menstrual cycle.
PrEP for HIV: effectiveness, how to take it, side effects, testing, and cost
PrEP can reduce HIV risk very substantially when the dosing plan, testing, and medical follow-up are aligned.
Biochemical pregnancy: early positive test, early bleeding, and what matters now
An early positive test followed by bleeding or a negative retest can create hope, confusion, and anxiety within the same few days.
Antibiotics in early pregnancy and while trying to conceive: what is actually proven and what remains myth
Many people take an antibiotic while trying to conceive or in early pregnancy and immediately worry about implantation problems, miscarriage, or harm to the baby.
Are my breasts still growing? What is normal in puberty and when you should get it checked
Breast development often begins earlier than expected, can happen unevenly, and does not finish at the same age for everyone.
Are my labia normal? What variety, asymmetry and symptoms mean
Labia do not all look the same.
How does masturbation really work? Body awareness, comfort, and honest answers without shame
For many people, masturbation is a normal part of sexuality, yet very few topics carry this much uncertainty, comparison, and outdated myth.
How does sex work? A clear guide to consent, what to expect, and protection
Sex is a shared process where consent, clear communication, a comfortable pace, and protection from pregnancy and infections matter most.
Which Position Helps You Get Pregnant? What Actually Helps and What Is Still a Myth
If you are trying to become pregnant, it is natural to wonder whether one sex position works better than another.
How Long Does Sex Last? Average Duration, Studies, and Why Minutes Are Rarely the Most Useful Answer
Many people want to know how long sex lasts on average.
How often do people have sex? Average, age, relationships and the key numbers
Many people want to know how often people really have sex.How many sexual partners does a person have in their lifetime? Actual figures, country comparisons and context
This article is deliberately about concrete numbers, not vague internet claims. In the data used here, Germany comes out at roughly 3 to 4 lifetime partners at the median, the US at 4 to 5, Great Britain at 4 to 6, and France stands out with noticeably higher averages. For readers in India, these numbers are mainly useful as an international reference point for interpreting typical ranges. On top of that, there are clear figures for the last year, for the upper end of the distribution, and for the reason average and median often tell completely different stories.
Vaginal discharge explained: what is normal, what stands out, and when to get evaluated
Vaginal discharge is not automatically a problem.
Do I have a sexually transmitted infection? Calm assessment of risk after sex, a one‑night stand and condom mishaps
Many people initially feel uncertain after intimacy. The body feels different; you suddenly notice every twinge, every moisture, every smell. This is normal.
How do I reach orgasm? What actually helps, what creates pressure, and when getting support makes sense
A lot of people look for one trick that will finally make orgasm happen.
Am I gay, lesbian, or bi? Understanding orientation without pressure or rushed labels
The question Am I gay, lesbian, or bi often hits hardest when feelings, fantasies, and closeness no longer fit neatly into your old self-image.
Heartbreak: Why breakup pain can feel so overwhelming and what really helps
Heartbreak can take over the entire day: the first thought when you wake up, a heavy feeling in your chest by afternoon, and overthinking again at night instead of sleep.
Am I pregnant? A calm reality check on symptoms, timing and tests
Many people, when they ask “Am I pregnant?”, are not asking only a medical question but expressing a feeling: I need certainty right now. That is precisely why symptom lists alone work so poorly. They rarely provide clarity and often increase rumination.
Wanting children: yes or no? A practical, pressure-free guide
Deciding whether to have children is one of the biggest life decisions for many people. Some feel a clear desire; others feel doubt or keep going back and forth. This article helps you separate outside pressure from your own view, put common myths into context, and make a decision that works for your real life.