Fertility guides
Each guide is built on primary sources and our own analysis of CDC clinic data, with every figure cited.
Understanding success rates
- How to Read IVF Success Rates (Per Retrieval vs. Per Transfer)Why the same clinic can show a 30% or a 55% IVF success rate, and which CDC measure to use when comparing fertility clinics. Built on official CDC data.
- IVF Success Rates by Age: What the Latest CDC Data ShowsNational and clinic-level IVF live-birth rates by age group from the CDC's latest data, with three-year trends and how much clinics vary within each age band.
Choosing a clinic
- Questions to Ask a Fertility Clinic (and Red Flags to Watch For)A practical list of questions to ask a fertility clinic about success rates, lab standards, costs and care, plus warning signs, grounded in CDC clinic data.
- SART Membership and Lab Accreditation: What They MeanWhat SART membership and verified embryology lab accreditation mean for a US fertility clinic, how common they are by state, and how to check a clinic yourself.
By life stage & situation
- Egg Freezing in the US: Which Clinics Offer It and How Common It IsHow many US fertility clinics offer egg freezing, how common fertility-preservation cycles are by age and state, and what to ask a clinic, based on CDC data.
- Embryo Freezing vs. Egg Freezing: Differences, Data and LawsHow egg and embryo freezing differ, how common fertility preservation is in US IVF data by age, how many clinics offer each, and how Spain and Greece regulate it.
- IVF After 40: What the CDC Data ShowsLive-birth rates for IVF after 40 with own eggs and donor eggs, how many cycles patients need, and how clinics compare, from the CDC's latest national data.
- Fertility Treatment for Single Parents and LGBTQ+ FamiliesOptions single people and LGBTQ+ couples commonly use to build a family, and which US clinics report donor eggs, donated embryos and gestational carrier services.
Treatments explained
- Causes of Infertility in Women and Men: What the Data ShowsCommon causes of female and male infertility according to the NIH and MedlinePlus, plus how often each diagnosis appears in US IVF cycles reported to the CDC.
- Donor Egg IVF Success Rates: Fresh vs. Frozen Donor EggsCDC data on donor egg and donated embryo IVF outcomes in the US: live-birth rates per transfer by type, how many clinics offer donor eggs, and how to compare them.
- Fertility Testing: What Tests Are Used and What They Look ForThe fertility tests commonly used for women and men, according to MedlinePlus and the NIH, what each one checks, and how test results relate to IVF diagnoses in CDC data.
- Frozen vs. Fresh Embryo Transfer: How US Clinics Practice TodayHow often US fertility clinics use frozen vs. fresh embryo transfers, how that share changed over three years, and how outcomes compare in CDC data.
- IUI vs. IVF: How the Two Fertility Treatments DifferHow IUI and IVF work, who each is commonly used for, what NIH sources say about success and multiple births, and why CDC clinic data covers only IVF.
- Male Infertility and ICSI: How Often US Clinics Use ItCommon causes of male infertility, what intracytoplasmic sperm injection (ICSI) is, and how often US IVF transfers involve ICSI by age, clinic and state, from CDC data.
- Preimplantation Genetic Testing (PGT): How Often US Clinics Use ItHow often US fertility clinics use preimplantation genetic testing (PGT) on embryos, by age and state, how fast use has grown, and questions to ask, from CDC data.
- What Is Infertility? Definitions, How Common It Is, and When to Seek HelpHow WHO and the NIH define infertility, how common it is worldwide, how often male and female factors are involved, and why people in the US use IVF, from CDC data.