IVF BMI & Target-Weight Calculator
Enter your height and weight to see your exact BMI and how far it is, in pounds or kilograms, from the BMI values clinics commonly cite (30, 35, 38, 40, 45 and 50). The calculation runs entirely in your browser: nothing you type is stored or sent anywhere.
The table uses round BMI values that clinics commonly cite (30, 35, 38, 40, 45, 50). They are reference points for arithmetic, not rules; each clinic sets its own policy. See which clinics publish their BMI policy.
What ASRM says about weight and fertility treatment
American Society for Reproductive Medicine (ASRM): Obesity and reproduction (2021): no society-wide BMI threshold“On the basis of available evidence, there is no medical or ethical directive for adopting a society-wide BMI threshold for offering infertility treatment; rather, there is considerable evidence arguing against such a policy.”Source: asrm.org/practice-guidance/practice-committee-documents/o… · checked Nov 2026
American Society for Reproductive Medicine (ASRM): Obesity and reproduction (2021), conclusion: obesity not the sole criterion for denying treatment“Obesity should not be the sole criteria for denying a patient or couple access to infertility treatment.”Source: asrm.org/practice-guidance/practice-committee-documents/o… · checked Nov 2026
American Society for Reproductive Medicine (ASRM): Obesity and reproduction (2021), conclusion: program-specific BMI thresholds based on procedural safety“Individual programs should be empowered to adopt program-specific BMI thresholds solely on the basis of the ability to safely perform oocyte retrievals and other procedures within their clinical environment.”Source: asrm.org/practice-guidance/practice-committee-documents/o… · checked Nov 2026
American Society for Reproductive Medicine (ASRM): Obesity and reproduction (2021): pre-IVF evaluation for retrieval under anesthesia“Before an IVF cycle, women with obesity should be carefully evaluated with a multidisciplinary team to determine the safety of oocyte retrieval under anesthesia, considering factors such as BMI and comorbidities.”Source: asrm.org/practice-guidance/practice-committee-documents/o… · checked Nov 2026
GLP-1 medicines and anesthesia: what the ASA says
Egg retrieval is usually done under sedation, so guidance on GLP-1 receptor agonists (such as semaglutide and tirzepatide) before anesthesia is relevant. These are the ASA’s own words; your clinic’s anesthesia team decides what applies to you.
American Society of Anesthesiologists (ASA): GLP-1 agonists, 2023 consensus-based guidance: daily vs weekly dosing before elective procedures“For patients on daily dosing consider holding GLP-1 agonists on the day of the procedure/surgery. For patients on weekly dosing consider holding GLP-1 agonists a week prior to the procedure/surgery.”Source: asahq.org/about-asa/newsroom/news-releases/2023/06/americ… · checked Nov 2026
American Society of Anesthesiologists (ASA): GLP-1 agonists, 2023 guidance: applies irrespective of indication, dose or procedure type“This suggestion is irrespective of the indication (type 2 diabetes mellitus or weight loss), dose, or the type of procedure/surgery.”Source: asahq.org/about-asa/newsroom/news-releases/2023/06/americ… · checked Nov 2026
American Society of Anesthesiologists (ASA): GLP-1 agonists, 2023 guidance: GI symptoms on the day of the procedure“If gastrointestinal (GI) symptoms such as severe nausea/vomiting/retching, abdominal bloating, or abdominal pain are present, consider delaying elective procedure, and discuss the concerns of potential risk of regurgitation and pulmonary aspiration of gastric contents with the proceduralist/surgeon and the patient.”Source: asahq.org/about-asa/newsroom/news-releases/2023/06/americ… · checked Nov 2026
American Society of Anesthesiologists (ASA): GLP-1 agonists, 2023 guidance: no symptoms but drug not held“If the patient has no GI symptoms, but the GLP-1 agonists were not held as advised, proceed with ‘full stomach’ precautions or consider evaluating gastric volume by ultrasound, if possible and if proficient with the technique.”Source: asahq.org/about-asa/newsroom/news-releases/2023/06/americ… · checked Nov 2026
Before you rely on a number
- A BMI limit is a clinic policy, usually tied to where and how sedation is given. It differs between clinics and sometimes between a clinic’s own locations.
- Some clinics apply a different limit to embryo transfer, which does not need sedation.
- Ask for the policy in writing before paying a consultation fee: use the questions checklist.
Frequently asked questions
How is BMI calculated?
BMI is weight in kilograms divided by height in metres squared. In US units: weight in pounds × 703 ÷ height in inches squared.
How much weight do I need to lose to reach a BMI of 40?
It depends on your height. Enter your height and weight above; the table shows the weight that corresponds to each BMI value and the difference from your current weight.
Do I have to stop Ozempic, Wegovy or Zepbound before egg retrieval?
Follow your own anesthesiologist’s instructions. The American Society of Anesthesiologists has published guidance on GLP-1 medicines before procedures under sedation or anesthesia; its wording is quoted on this page with a link to the source.