Private Label Surrogacy. Nurse-led. Ethics-bound.
Menu

Glossary

Surrogacy terms M to P: definitions

The short answer

This glossary defines surrogacy, egg donation and IVF terms from M to P in one or two sentences each. Example entries: Matching: the agency process of pairing screened surrogates with intended parents on criteria both have stated; Nancy Block runs matching personally at PLS and it takes about 6 months today. Medical clearance: the fertility clinic's exam, ultrasound and labs confirming a surrogate can carry. Mosaic embryo: a PGT-A result showing both normal and abnormal cells. OHSS: ovarian hyperstimulation syndrome, a risk for egg donors, not surrogates. Parentage order: a court order naming the intended parents as legal parents; a pre-birth order is issued before delivery. PGT-A: genetic testing of an embryo's chromosome count. PIO: progesterone in oil, the daily injection that supports the lining. Psychological evaluation: assessment by an independent licensed mental health professional.

Written by Nancy Block, RN

Founder and Director. Fertility nurse, 17 years at Northwestern Memorial Hospital. Former President, SEEDS.

Medically reviewed by Mark Silverberg, MD

Last updated

Match, matching, medical clearance, medication start fee, mock cycle

Match

The decision of a surrogate and intended parents to work together, usually after a match meeting. See matching.

Matching

The agency process of pairing screened surrogates with intended parents on criteria both have stated. Nancy Block, RN, runs matching personally at PLS. Matching takes about 6 months today.

Medical clearance

The fertility clinic's exam, ultrasound and labs confirming a surrogate can carry. See medical screening.

Medication start fee

A $500 payment to a PLS surrogate from escrow when her medications begin.

Mock cycle

A practice transfer cycle with the same medications and no embryo. See mock cycle.

Monitoring, mosaic embryo, multiples fee, OB release, OHSS

Monitoring

Blood tests and ultrasounds during a cycle, usually at a clinic near the surrogate's home.

Mosaic embryo

A PGT-A result showing both normal and abnormal cells.

Multiples fee

Additional surrogate compensation for a twin or triplet pregnancy. The PLS schedule pays $5,000 for twins and $10,000 for triplets.

OB release

The point when the fertility clinic hands the surrogate's care to her own obstetrician, after early ultrasounds. See OB release.

OHSS

Ovarian hyperstimulation syndrome, a risk for egg donors, not surrogates. See OHSS risks.

Parentage order, pre-birth order, post-birth order, PGT-A, PIO

Parentage order

A court order naming the intended parents as the child's legal parents. See legal parentage.

Pre-birth order

A parentage order granted before delivery, so the birth certificate lists the intended parents from the start. See pre-birth order. Illinois law provides for pre-birth parentage (reviewed by counsel).

Post-birth order

A parentage order granted after delivery, in states that do not allow pre-birth orders. See pre-birth vs post-birth.

PGT-A

Preimplantation genetic testing for aneuploidy: testing of an embryo's chromosome count before transfer. See PGT-A.

PIO

Progesterone in oil, the daily injection that supports the lining. See progesterone in oil.

Pregnancy test, progesterone, program fee, psychological evaluation

Pregnancy test

The beta hCG blood test 9 to 11 days after transfer. See beta hCG.

Progesterone

The hormone that makes the lining receptive and supports early pregnancy until the placenta takes over.

Program fee

The agency's fee for screening, matching and case management, paid in installments. Program fee: confirm current schedule. See surrogacy cost.

Psychological evaluation

An assessment of the surrogate by an independent licensed mental health professional. See psychological evaluation.

How to cite this glossary

Cite as Private Label Surrogacy, "Surrogacy terms M to P: definitions," by Nancy Block, RN, medically reviewed by Mark Silverberg, MD, last updated October 14, 2026, privatelabelsurrogacy.com/glossary/surrogacy-terms-m-p/. Previous: terms G to L. Next: terms Q to Z.

Term Related page Source
Mock cycle Mock cycle ASRM
Mosaic embryo, PGT-A PGT-A ASRM, SART
OB release OB release ACOG
Pre-birth order Pre-birth order Illinois statute
PIO Progesterone in oil ASRM

Sources

Editor notes (D-059): Multiples fees and matching duration from brief; CONFIRM WITH NANCY.

Frequently asked questions

What is the difference between a pre-birth and a post-birth parentage order?

A pre-birth order is granted before delivery so the birth certificate lists the intended parents from the start; a post-birth order is granted after delivery in states that do not allow pre-birth orders.

What is the multiples fee?

Additional surrogate compensation for a twin or triplet pregnancy: $5,000 for twins and $10,000 for triplets in the PLS schedule. Confirm current schedule.

What is the program fee?

The agency's fee for screening, matching and case management, paid in installments; see the cost page for the current PLS schedule.