足月/过期/早中晚孕胎盘，孕周，重量，重量与正常值比较：

Ａ大体异常，如帆状胎盘，轮廓胎盘等。

Ｂ羊膜和绒毛膜。

Ｃ绒毛成熟度：与孕周相适应／成熟加速／成熟滞后。

Ｄ绒毛病变。

Ｅ蜕膜（底板）病变

Ｆ脐带病变。

下面是些诊断的实例摘抄，部分翻译了（这些是连续病理号，即同一天的病例，即有如此多的发现）：

FULL TERM PLACENTA, 39 WEEKS, 339 GRAMS,<10TH PERCENTILE:足月分娩胎盘，孕39周，339克，低于10%正常值：
A. MILD ACUTE CHORIOAMNIONITIS INVOLVING THE EXTRAPLACENTAL MEMBRANES.轻度急性绒毛膜羊膜炎，累及胎膜。
B. VILLOUS MATURATION APPROPRIATE FOR GESTATIONAL AGE.绒毛成熟度与孕周相适应。
C. CHRONIC VILLITIS OF UNKNOWN ETIOLOGY INVOLVING LESS THAN 5% OF THE VILLI EXAMINED.原因不明的慢性绒毛炎（唐敏一《胎盘病理学》的翻译，是否可以考虑翻译为特发性慢性绒毛炎？），累及小于镜检绒毛的5%。

D. UNREMARKABLE DECIDUA.蜕膜无特殊。
E. UNREMARKABLE THREE VESSEL UMBILICAL CORD.脐带无特殊，脐血管3根。

EARLY TERM PLACENTA, 37 WEEKS, 521 GRAMS, GREATER THEN 90TH PERCENTILE –
A. UNREMARKABLE AMNION AND CHORION.
B. VILLOUS MATURATION ADVANCED FOR GESTATIONAL AGE.
C. FOCAL DISTAL VILLOUS HYPOPLASIA. 局灶性远端绒毛欠发育。
D. MULTIPLE SMALL INTERVILLOUS THROMBI, TOGETHER INVOLVING LESS THAN 5% OF THE PLACENTAL VOLUME.多灶性绒毛间隙血栓形成，累及<5%胎盘。
E. UNREMARKABLE DECIDUA.
F. UNREMARKABLE THREE-VESSEL UMBILICAL CORD.

THIRD (3RD) TRIMESTER PLACENTA, 31 WEEKS, 323 GRAMS, 25TH-50TH PERCENTILE –
A. UNREMARKABLE AMNION AND CHORION.
B. VILLOUS MATURATION APPROPRIATE FOR GESTATIONAL AGE.
C. 20 X 3 CM RECENT AND FOCALLY REMOTE DECIDUAL HEMORRHAGE.
D. UNREMARKABLE THREE-VESSEL UMBILICAL CORD.
E. 12 X 11 X 3 CM AGGREGATE OF CLOTTED BLOOD RECEIVED WITH THE PLACENTA.

POST-TERM PLACENTA, 42 WEEKS, 407 GRAMS, 10TH TO 25TH PERCENTILE –
A. ACUTE CHORIOAMNIONITIS, STAGE 1, GRADE 1. 急性绒毛膜羊膜炎，1期，1级。
B. PIGMENTED MACROPHAGES WITHIN THE MEMBRANES.胎膜见噬色素巨噬细胞。
C. VILLOUS MATURATION APPROPRIATE FOR GESTATIONAL AGE.
D. ACUTE DECIDUITIS.急性蜕膜炎。
E. UNREMARKABLE THREE-VESSEL UMBILICAL CORD.

FULL TERM PLACENTA, 39 WEEKS, 339 GRAMS,<10TH PERCENTILE –
A. MILD ACUTE CHORIOAMNIONITIS INVOLVING THE EXTRAPLACENTAL MEMBRANES.
B. VILLOUS MATURATION APPROPRIATE FOR GESTATIONAL AGE.
C. CHRONIC VILLITIS OF UNKNOWN ETIOLOGY INVOLVING LESS THAN 5% OF THE VILLI EXAMINED.
D. UNREMARKABLE DECIDUA.
E. UNREMARKABLE THREE VESSEL UMBILICAL CORD.

3RD TRIMESTER PLACENTA, 31 WEEKS, 149 GRAMS,<10TH PERCENTILE:
A. UNREMARKABLE AMNION AND CHORION.
B. VILLOUS MATURATION SIGNIFICANTLY ADVANCED FOR GESTATIONAL AGE.绒毛明显成熟加速。
C. CHRONIC VILLITIS OF UNKNOWN ETIOLOGY INVOLVING LESS THAN 5% OF THE VILLI EXAMINED.
D. TWO REMOTE INFARCTS, 2.5 AND 3.5 CM. 两处陈旧性梗死灶，大小
E. UNREMARKABLE DECIDUA.
F. UNREMARKABLE THREE VESSEL UMBILICAL CORD.

FULL TERM PLACENTA, 40 WEEKS, 447 GRAMS, 25-50TH PERCENTILE –
A. ACUTE CHORIOAMNIONITIS, STAGE 1, GRADE 1.
B. ACUTE VASCULITIS INVOLVING FETAL CHORIONIC PLATE VESSELS.急性血管炎，累及绒毛膜板内血管。
C. REACTIVE AMNION.羊膜反应性改变。
D. PIGMENTED MACROPHAGES WITHIN THE MEMBRANES.
E. VILLOUS MATURATION APPROPRIATE FOR GESTATIONAL AGE.
F. FOCAL CHORANGIOMATOSIS.局灶性绒毛血管瘤病。
G. UNREMARKABLE DECIDUA.
H. UNREMARKABLE THREE VESSEL UMBILICAL CORD.

3RD TRIMESTER PLACENTA, 36 WEEKS, 501 GRAMS, >90TH PERCENTILE:
A. UNREMARKABLE AMNION AND CHORION.
B. VILLOUS MATURATION ADVANCED FOR GESTATIONAL AGE.
C. INCREASED FIBRIN DEPOSITION. 绒毛间隙纤维素沉积增多。
D. FOCAL VILLOUS AGGLUTINATION.局灶绒毛粘连。
E. MICROSCOPIC FOCUS OF AVASCULAR VILLI.镜下无血管绒毛。
F. 2 CM INTERVILLOUS THROMBUS.绒毛间隙血栓。
G. UNREMARKABLE DECIDUA.
H. UNREMARKABLE THREE VESSEL UMBILICAL CORD.

增加一例：